diff --git a/postgres/parser/sem/tree/format.go b/postgres/parser/sem/tree/format.go
index 8c11d5446f..cec0f0905c 100644
--- a/postgres/parser/sem/tree/format.go
+++ b/postgres/parser/sem/tree/format.go
@@ -442,9 +442,9 @@ func AsStringWithFQNames(n NodeFormatter, ann *Annotations) string {
 	return ctx.CloseAndGetString()
 }
 
-// AsString pretty prints a node to a string.
+// AsString pretty prints a node to a string, with unquoted identifiers.
 func AsString(n NodeFormatter) string {
-	return AsStringWithFlags(n, FmtSimple)
+	return AsStringWithFlags(n, FmtSimple|FmtBareIdentifiers)
 }
 
 // ErrString pretty prints a node to a string. Identifiers are not quoted.
diff --git a/server/analyzer/validate_create_table.go b/server/analyzer/validate_create_table.go
index 2519aa1782..dcf0f2b92e 100755
--- a/server/analyzer/validate_create_table.go
+++ b/server/analyzer/validate_create_table.go
@@ -124,6 +124,10 @@ func schToColMap(sch sql.Schema) map[string]*sql.Column {
 func validateIndex(ctx *sql.Context, colMap map[string]*sql.Column, idxDef *sql.IndexDef) error {
 	seenCols := make(map[string]struct{})
 	for _, idxCol := range idxDef.Columns {
+		if idxCol.Expression != nil {
+			continue
+		}
+
 		schCol, exists := colMap[strings.ToLower(idxCol.Name)]
 		if !exists {
 			return sql.ErrKeyColumnDoesNotExist.New(idxCol.Name)
diff --git a/server/ast/index_elem.go b/server/ast/index_elem.go
index c6c9b841e6..ab1dc35b63 100644
--- a/server/ast/index_elem.go
+++ b/server/ast/index_elem.go
@@ -27,10 +27,6 @@ import (
 func nodeIndexElemList(ctx *Context, node tree.IndexElemList) ([]*vitess.IndexField, error) {
 	vitessIndexColumns := make([]*vitess.IndexField, 0, len(node))
 	for _, inputColumn := range node {
-		if inputColumn.Expr != nil {
-			return nil, errors.Errorf("expression index attribute is not yet supported")
-		}
-
 		if inputColumn.Collation != "" {
 			logrus.Warn("index attribute collation is not yet supported, ignoring")
 		}
diff --git a/server/tables/information_schema/columns_table.go b/server/tables/information_schema/columns_table.go
index 1bec8b6e52..5a697a4e7b 100644
--- a/server/tables/information_schema/columns_table.go
+++ b/server/tables/information_schema/columns_table.go
@@ -204,6 +204,9 @@ func getRowsFromTable(ctx *sql.Context, db information_schema.DbWithNames, t sql
 
 	tblName := t.Name()
 	for i, col := range information_schema.SchemaForTable(t, db.Database, allColsWithDefaultValue) {
+		if col.HiddenSystem {
+			continue
+		}
 		r := getRowFromColumn(ctx, i, col, db.CatalogName, db.SchemaName, tblName)
 		if r != nil {
 			rows = append(rows, r)
diff --git a/testing/generation/command_docs/output/create_index_test.go b/testing/generation/command_docs/output/create_index_test.go
index 32a038c55f..97eb505e23 100644
--- a/testing/generation/command_docs/output/create_index_test.go
+++ b/testing/generation/command_docs/output/create_index_test.go
@@ -22,7 +22,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name USING method ( ( expression ) ASC NULLS LAST , ( expression ) )"),
 		Parses("CREATE INDEX name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST , column_name opclass )"),
 		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( column_name COLLATE en_US ASC NULLS LAST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) )"),
-		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) ASC NULLS FIRST , column_name ASC )"),
+		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) ASC NULLS FIRST , column_name ASC )"),
 		Parses("CREATE INDEX ON table_name ( ( expression ) COLLATE en_US opclass NULLS LAST , ( expression ) COLLATE en_US ASC )"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name USING method ( ( expression ) DESC NULLS LAST , ( expression ) DESC )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name ( column_name COLLATE en_US opclass ASC , ( expression ) opclass DESC )"),
@@ -130,7 +130,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( column_name , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST ) INCLUDE ( column_name , column_name )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) COLLATE en_US , column_name DESC NULLS LAST ) INCLUDE ( column_name , column_name )"),
 		Parses("CREATE INDEX name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , column_name COLLATE en_US opclass DESC NULLS LAST ) INCLUDE ( column_name , column_name )"),
-		Parses("CREATE INDEX name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST , column_name COLLATE en_US opclass ) NULLS DISTINCT"),
+		Converts("CREATE INDEX name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST , column_name COLLATE en_US opclass ) NULLS DISTINCT"),
 		Converts("CREATE INDEX name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC , column_name opclass ( opclass_parameter = value ) ) NULLS DISTINCT"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( column_name COLLATE en_US ASC NULLS LAST , column_name opclass ( opclass_parameter = value ) ) NULLS DISTINCT"),
 		Parses("CREATE INDEX ON table_name ( column_name DESC NULLS LAST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS DISTINCT"),
@@ -140,14 +140,14 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX name ON table_name USING method ( ( expression ) COLLATE en_US NULLS LAST , column_name opclass DESC ) NULLS DISTINCT"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC ) NULLS DISTINCT"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name USING method ( ( expression ) opclass NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC ) NULLS DISTINCT"),
-		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS DISTINCT"),
+		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS DISTINCT"),
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name USING method ( column_name COLLATE en_US NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS DISTINCT"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) COLLATE en_US DESC NULLS LAST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS DISTINCT"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON ONLY table_name USING method ( ( expression ) DESC NULLS LAST , column_name COLLATE en_US NULLS FIRST ) NULLS DISTINCT"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , column_name COLLATE en_US opclass NULLS FIRST ) NULLS DISTINCT"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name USING method ( ( expression ) DESC NULLS FIRST , ( expression ) COLLATE en_US opclass NULLS FIRST ) NULLS DISTINCT"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST , ( expression ) COLLATE en_US opclass NULLS FIRST ) NULLS DISTINCT"),
-		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT"),
+		Converts("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT"),
 		Parses("CREATE INDEX ON ONLY table_name USING method ( ( expression ) COLLATE en_US ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( column_name ASC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , column_name opclass ASC NULLS FIRST ) NULLS DISTINCT"),
@@ -250,13 +250,13 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY ON table_name USING method ( column_name COLLATE en_US DESC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS DISTINCT"),
 		Parses("CREATE UNIQUE INDEX name ON table_name USING method ( column_name opclass ( opclass_parameter = value ) DESC , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS DISTINCT"),
 		Parses("CREATE UNIQUE INDEX name ON table_name ( ( expression ) ASC NULLS LAST , column_name ) NULLS NOT DISTINCT"),
-		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , ( expression ) opclass ) NULLS NOT DISTINCT"),
+		Converts("CREATE UNIQUE INDEX ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , ( expression ) opclass ) NULLS NOT DISTINCT"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST , ( expression ) opclass ) NULLS NOT DISTINCT"),
-		Parses("CREATE INDEX ON ONLY table_name ( column_name COLLATE en_US opclass , ( expression ) COLLATE en_US opclass ) NULLS NOT DISTINCT"),
+		Converts("CREATE INDEX ON ONLY table_name ( column_name COLLATE en_US opclass , ( expression ) COLLATE en_US opclass ) NULLS NOT DISTINCT"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) , ( expression ) COLLATE en_US opclass ) NULLS NOT DISTINCT"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( column_name COLLATE en_US ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ) NULLS NOT DISTINCT"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS NOT DISTINCT"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US DESC , column_name ASC ) NULLS NOT DISTINCT"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US DESC , column_name ASC ) NULLS NOT DISTINCT"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC , column_name COLLATE en_US opclass ASC ) NULLS NOT DISTINCT"),
 		Converts("CREATE INDEX IF NOT EXISTS name ON table_name ( column_name ASC , column_name opclass ( opclass_parameter = value ) ASC ) NULLS NOT DISTINCT"),
 		Parses("CREATE INDEX name ON table_name USING method ( column_name COLLATE en_US DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC ) NULLS NOT DISTINCT"),
@@ -270,7 +270,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC ) NULLS NOT DISTINCT"),
 		Parses("CREATE UNIQUE INDEX ON table_name USING method ( ( expression ) COLLATE en_US opclass ASC NULLS LAST , ( expression ) COLLATE en_US NULLS FIRST ) NULLS NOT DISTINCT"),
 		Parses("CREATE UNIQUE INDEX ON ONLY table_name USING method ( column_name COLLATE en_US , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT"),
-		Parses("CREATE UNIQUE INDEX ON table_name ( ( expression ) opclass DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT"),
+		Converts("CREATE UNIQUE INDEX ON table_name ( ( expression ) opclass DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , column_name COLLATE en_US opclass ASC NULLS FIRST ) NULLS NOT DISTINCT"),
 		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( column_name COLLATE en_US ASC NULLS LAST , ( expression ) DESC NULLS FIRST ) NULLS NOT DISTINCT"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name ( column_name opclass ( opclass_parameter = value ) DESC NULLS LAST , ( expression ) DESC NULLS FIRST ) NULLS NOT DISTINCT"),
@@ -374,7 +374,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name COLLATE en_US opclass ( opclass_parameter = value ) ) WITH ( fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name USING method ( ( expression ) COLLATE en_US DESC , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ) WITH ( fillfactor )"),
 		Parses("CREATE INDEX name ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC , ( expression ) ASC ) WITH ( fillfactor )"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST , ( expression ) ASC ) WITH ( fillfactor )"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST , ( expression ) ASC ) WITH ( fillfactor )"),
 		Parses("CREATE INDEX ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass DESC , column_name COLLATE en_US ASC ) WITH ( fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , ( expression ) opclass ASC ) WITH ( fillfactor )"),
 		Converts("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name COLLATE en_US opclass ASC ) WITH ( fillfactor )"),
@@ -386,9 +386,9 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( column_name opclass NULLS LAST , ( expression ) opclass DESC ) WITH ( fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name USING method ( column_name COLLATE en_US NULLS LAST , ( expression ) COLLATE en_US opclass DESC ) WITH ( fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name ( column_name opclass ( opclass_parameter = value ) , ( expression ) opclass ( opclass_parameter = value ) DESC ) WITH ( fillfactor )"),
-		Parses("CREATE INDEX name ON ONLY table_name ( ( expression ) DESC , ( expression ) NULLS FIRST ) WITH ( fillfactor )"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) opclass ASC NULLS FIRST , ( expression ) COLLATE en_US NULLS FIRST ) WITH ( fillfactor )"),
-		Parses("CREATE INDEX ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor )"),
+		Converts("CREATE INDEX name ON ONLY table_name ( ( expression ) DESC , ( expression ) NULLS FIRST ) WITH ( fillfactor )"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) opclass ASC NULLS FIRST , ( expression ) COLLATE en_US NULLS FIRST ) WITH ( fillfactor )"),
+		Converts("CREATE INDEX ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name ( column_name opclass ASC , ( expression ) COLLATE en_US opclass ASC NULLS FIRST ) WITH ( fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor )"),
@@ -502,7 +502,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) WITH ( fillfactor )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST , ( expression ) ) NULLS DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value ) NULLS LAST , ( expression ) opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor )"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor )"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE INDEX name ON table_name USING method ( column_name DESC NULLS LAST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE INDEX name ON ONLY table_name USING method ( column_name COLLATE en_US opclass DESC , column_name COLLATE en_US ASC ) NULLS DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE INDEX name ON ONLY table_name USING method ( ( expression ) COLLATE en_US ASC NULLS FIRST , column_name COLLATE en_US ASC ) NULLS DISTINCT WITH ( fillfactor )"),
@@ -510,13 +510,13 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX ON table_name ( column_name opclass ( opclass_parameter = value ) NULLS LAST , ( expression ) COLLATE en_US ASC ) NULLS DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE INDEX ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST , column_name opclass ASC ) NULLS DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON ONLY table_name USING method ( ( expression ) COLLATE en_US DESC NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor )"),
-		Parses("CREATE INDEX name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value ) ASC , column_name DESC ) NULLS DISTINCT WITH ( fillfactor )"),
+		Converts("CREATE INDEX name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value ) ASC , column_name DESC ) NULLS DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE INDEX name ON ONLY table_name USING method ( ( expression ) COLLATE en_US ASC NULLS FIRST , ( expression ) opclass DESC ) NULLS DISTINCT WITH ( fillfactor )"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor )"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , ( expression ) opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name ( column_name COLLATE en_US ASC , column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor )"),
-		Parses("CREATE INDEX ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor )"),
+		Converts("CREATE INDEX ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE INDEX name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE INDEX name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE INDEX name ON table_name USING method ( ( expression ) COLLATE en_US DESC NULLS LAST , ( expression ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor )"),
@@ -607,7 +607,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( ( expression ) DESC NULLS LAST , column_name ASC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE INDEX name ON ONLY table_name USING method ( column_name COLLATE en_US ASC , column_name opclass ( opclass_parameter = value ) ASC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS LAST , ( expression ) opclass ( opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS DISTINCT WITH ( fillfactor )"),
-		Parses("CREATE UNIQUE INDEX ON table_name ( ( expression ) opclass NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor )"),
+		Converts("CREATE UNIQUE INDEX ON table_name ( ( expression ) opclass NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor )"),
 		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name opclass ( opclass_parameter = value ) DESC , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE INDEX ON table_name USING method ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , ( expression ) COLLATE en_US DESC ) NULLS NOT DISTINCT WITH ( fillfactor )"),
@@ -625,7 +625,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( column_name opclass ASC , column_name ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS LAST , ( expression ) COLLATE en_US opclass ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name USING method ( column_name opclass DESC , ( expression ) opclass DESC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor )"),
-		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name opclass ( opclass_parameter = value ) ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor )"),
+		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name opclass ( opclass_parameter = value ) ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE UNIQUE INDEX ON table_name ( ( expression ) COLLATE en_US opclass ASC , ( expression ) NULLS LAST ) NULLS NOT DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name COLLATE en_US NULLS LAST ) NULLS NOT DISTINCT WITH ( fillfactor )"),
 		Parses("CREATE INDEX ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass NULLS LAST , ( expression ) COLLATE en_US NULLS LAST ) NULLS NOT DISTINCT WITH ( fillfactor )"),
@@ -720,7 +720,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( ( expression ) ASC NULLS LAST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ) WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name USING method ( column_name opclass NULLS FIRST , column_name COLLATE en_US ASC ) WITH ( fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST , column_name opclass ASC ) WITH ( fillfactor = value )"),
-		Parses("CREATE INDEX name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST , column_name opclass ( opclass_parameter = value ) ASC ) WITH ( fillfactor = value )"),
+		Converts("CREATE INDEX name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST , column_name opclass ( opclass_parameter = value ) ASC ) WITH ( fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name ( ( expression ) opclass ( opclass_parameter = value ) NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name USING method ( ( expression ) COLLATE en_US opclass , column_name DESC ) WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass NULLS FIRST , column_name DESC ) WITH ( fillfactor = value )"),
@@ -743,7 +743,7 @@ func TestCreateIndex(t *testing.T) {
 		Converts("CREATE UNIQUE INDEX ON table_name ( column_name COLLATE en_US NULLS FIRST , column_name opclass DESC NULLS FIRST ) WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value ) DESC , column_name COLLATE en_US opclass DESC NULLS FIRST ) WITH ( fillfactor = value )"),
 		Parses("CREATE INDEX ON table_name USING method ( column_name COLLATE en_US DESC NULLS LAST , column_name opclass ( opclass_parameter = value ) DESC NULLS FIRST ) WITH ( fillfactor = value )"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC , ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST ) WITH ( fillfactor = value )"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC , ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST ) WITH ( fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST ) WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST , column_name opclass ( opclass_parameter = value ) NULLS LAST ) WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST ) WITH ( fillfactor = value )"),
@@ -843,11 +843,11 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name USING method ( ( expression ) COLLATE en_US NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON ONLY table_name ( column_name opclass DESC NULLS LAST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) WITH ( fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name USING method ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , ( expression ) ) NULLS DISTINCT WITH ( fillfactor = value )"),
-		Parses("CREATE INDEX name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor = value )"),
+		Converts("CREATE INDEX name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name USING method ( column_name DESC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON ONLY table_name ( ( expression ) COLLATE en_US opclass DESC NULLS LAST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX ON table_name USING method ( ( expression ) COLLATE en_US opclass ASC NULLS FIRST , column_name ASC ) NULLS DISTINCT WITH ( fillfactor = value )"),
-		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( column_name COLLATE en_US opclass NULLS FIRST , ( expression ) ASC ) NULLS DISTINCT WITH ( fillfactor = value )"),
+		Converts("CREATE UNIQUE INDEX ON ONLY table_name ( column_name COLLATE en_US opclass NULLS FIRST , ( expression ) ASC ) NULLS DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name ( column_name opclass ASC NULLS LAST , column_name COLLATE en_US opclass DESC ) NULLS DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name DESC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor = value )"),
@@ -866,7 +866,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) COLLATE en_US , ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC , column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US opclass ASC NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value )"),
-		Parses("CREATE UNIQUE INDEX name ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value )"),
+		Converts("CREATE UNIQUE INDEX name ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC , column_name opclass ( opclass_parameter = value ) DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name USING method ( ( expression ) DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name USING method ( ( expression ) , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value )"),
@@ -968,13 +968,13 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) opclass NULLS LAST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) opclass DESC NULLS LAST ) NULLS NOT DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( ( expression ) ASC , column_name COLLATE en_US ) NULLS NOT DISTINCT WITH ( fillfactor = value )"),
-		Parses("CREATE INDEX name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name COLLATE en_US ) NULLS NOT DISTINCT WITH ( fillfactor = value )"),
+		Converts("CREATE INDEX name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name COLLATE en_US ) NULLS NOT DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name ( column_name opclass ( opclass_parameter = value ) DESC NULLS LAST , column_name COLLATE en_US ) NULLS NOT DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value ) DESC NULLS LAST , column_name COLLATE en_US ) NULLS NOT DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE INDEX name ON table_name USING method ( ( expression ) , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE INDEX name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , ( expression ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor = value )"),
-		Parses("CREATE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC , column_name opclass ASC ) NULLS NOT DISTINCT WITH ( fillfactor = value )"),
+		Converts("CREATE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC , column_name opclass ASC ) NULLS NOT DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name COLLATE en_US opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( ( expression ) ASC NULLS LAST , column_name opclass ( opclass_parameter = value ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE INDEX name ON table_name ( column_name ASC NULLS LAST , ( expression ) opclass ( opclass_parameter = value ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value )"),
@@ -1092,7 +1092,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( column_name COLLATE en_US NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS NOT DISTINCT WITH ( fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( ( expression ) ASC NULLS LAST , ( expression ) COLLATE en_US ) WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON ONLY table_name ( column_name COLLATE en_US ASC , ( expression ) COLLATE en_US opclass ) WITH ( fillfactor , fillfactor )"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass DESC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) WITH ( fillfactor , fillfactor )"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass DESC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) WITH ( fillfactor , fillfactor )"),
 		Converts("CREATE INDEX ON ONLY table_name ( column_name ASC , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ) WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ) WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name ( ( expression ) COLLATE en_US opclass ASC NULLS FIRST , ( expression ) COLLATE en_US ASC ) WITH ( fillfactor , fillfactor )"),
@@ -1106,7 +1106,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value ) DESC NULLS LAST , ( expression ) opclass ( opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name USING method ( ( expression ) COLLATE en_US NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) DESC NULLS LAST , column_name ASC NULLS FIRST ) WITH ( fillfactor , fillfactor )"),
-		Parses("CREATE INDEX name ON table_name ( ( expression ) opclass ASC NULLS FIRST , column_name COLLATE en_US ASC NULLS FIRST ) WITH ( fillfactor , fillfactor )"),
+		Converts("CREATE INDEX name ON table_name ( ( expression ) opclass ASC NULLS FIRST , column_name COLLATE en_US ASC NULLS FIRST ) WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( column_name COLLATE en_US ASC NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX ON table_name USING method ( column_name opclass ( opclass_parameter = value ) , ( expression ) DESC NULLS FIRST ) WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( ( expression ) opclass ASC NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST ) WITH ( fillfactor , fillfactor )"),
@@ -1221,7 +1221,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX name ON table_name ( column_name COLLATE en_US DESC NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX name ON ONLY table_name USING method ( column_name opclass ( opclass_parameter = value ) DESC , ( expression ) opclass ASC ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX name ON ONLY table_name ( column_name ASC NULLS LAST , column_name opclass ( opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( column_name COLLATE en_US opclass , ( expression ) opclass ( opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( column_name COLLATE en_US opclass , ( expression ) opclass ( opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX name ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX ON ONLY table_name USING method ( ( expression ) ASC , column_name COLLATE en_US opclass DESC ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS LAST , column_name COLLATE en_US opclass DESC ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
@@ -1232,7 +1232,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX ON ONLY table_name USING method ( column_name opclass DESC NULLS LAST , column_name COLLATE en_US opclass ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( column_name opclass DESC , column_name COLLATE en_US DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name USING method ( column_name COLLATE en_US ASC NULLS LAST , column_name COLLATE en_US opclass DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
-		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( column_name ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
+		Converts("CREATE UNIQUE INDEX ON ONLY table_name ( column_name ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , ( expression ) NULLS LAST ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name ( column_name opclass NULLS LAST , ( expression ) NULLS LAST ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) , column_name COLLATE en_US NULLS LAST ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
@@ -1334,7 +1334,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( ( expression ) ASC NULLS FIRST , column_name COLLATE en_US opclass DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX name ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
-		Parses("CREATE INDEX ON table_name ( column_name COLLATE en_US , ( expression ) ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
+		Converts("CREATE INDEX ON table_name ( column_name COLLATE en_US , ( expression ) ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name USING method ( ( expression ) NULLS FIRST , column_name COLLATE en_US ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) , column_name opclass ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name opclass ASC NULLS LAST , column_name opclass ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
@@ -1349,10 +1349,10 @@ func TestCreateIndex(t *testing.T) {
 		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name USING method ( ( expression ) opclass DESC NULLS FIRST , column_name DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US NULLS FIRST , ( expression ) COLLATE en_US opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US NULLS FIRST , ( expression ) COLLATE en_US opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , ( expression ) COLLATE en_US opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name USING method ( ( expression ) COLLATE en_US DESC NULLS FIRST , ( expression ) COLLATE en_US opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
-		Parses("CREATE UNIQUE INDEX name ON table_name ( ( expression ) opclass ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
+		Converts("CREATE UNIQUE INDEX name ON table_name ( ( expression ) opclass ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST , ( expression ) COLLATE en_US ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
 		Converts("CREATE INDEX ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) , column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name ( column_name DESC NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
@@ -1473,12 +1473,12 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( ( expression ) ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( ( expression ) opclass DESC NULLS LAST , ( expression ) opclass ) WITH ( fillfactor = value , fillfactor )"),
 		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC , column_name COLLATE en_US opclass ( opclass_parameter = value ) ) WITH ( fillfactor = value , fillfactor )"),
-		Parses("CREATE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ) WITH ( fillfactor = value , fillfactor )"),
+		Converts("CREATE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ) WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX ON table_name USING method ( ( expression ) opclass DESC NULLS LAST , ( expression ) ASC ) WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , column_name opclass ( opclass_parameter = value ) ASC ) WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name USING method ( column_name COLLATE en_US , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX name ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) WITH ( fillfactor = value , fillfactor )"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC , ( expression ) COLLATE en_US DESC ) WITH ( fillfactor = value , fillfactor )"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC , ( expression ) COLLATE en_US DESC ) WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( column_name opclass ( opclass_parameter = value ) DESC , column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC ) WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX name ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) DESC NULLS LAST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name opclass ( opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor = value , fillfactor )"),
@@ -1486,7 +1486,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) , ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name USING method ( column_name COLLATE en_US opclass NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor = value , fillfactor )"),
-		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , column_name DESC NULLS FIRST ) WITH ( fillfactor = value , fillfactor )"),
+		Converts("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , column_name DESC NULLS FIRST ) WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS LAST , column_name DESC NULLS FIRST ) WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX name ON table_name USING method ( column_name COLLATE en_US ASC , ( expression ) DESC NULLS FIRST ) WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name USING method ( column_name COLLATE en_US NULLS FIRST , column_name COLLATE en_US DESC NULLS FIRST ) WITH ( fillfactor = value , fillfactor )"),
@@ -1576,25 +1576,25 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US opclass NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name USING method ( ( expression ) COLLATE en_US ASC , ( expression ) opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
-		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
+		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS LAST , column_name opclass DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name ( ( expression ) opclass ( opclass_parameter = value ) DESC , column_name COLLATE en_US opclass DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
-		Parses("CREATE INDEX ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST , ( expression ) COLLATE en_US opclass DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
+		Converts("CREATE INDEX ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST , ( expression ) COLLATE en_US opclass DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , ( expression ) COLLATE en_US opclass NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( ( expression ) opclass ASC NULLS LAST , column_name opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
-		Parses("CREATE INDEX ON ONLY table_name ( column_name COLLATE en_US , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
+		Converts("CREATE INDEX ON ONLY table_name ( column_name COLLATE en_US , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC , column_name ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS LAST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
-		Parses("CREATE UNIQUE INDEX name ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name opclass DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
+		Converts("CREATE UNIQUE INDEX name ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name opclass DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS LAST , column_name COLLATE en_US opclass DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name USING method ( ( expression ) ASC , ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US opclass DESC , ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
-		Parses("CREATE INDEX ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
+		Converts("CREATE INDEX ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name USING method ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US ASC NULLS LAST , ( expression ) COLLATE en_US NULLS LAST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS LAST , ( expression ) opclass NULLS LAST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor )"),
@@ -1694,7 +1694,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS LAST , ( expression ) opclass ( opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX name ON ONLY table_name ( column_name COLLATE en_US opclass ASC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US DESC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
-		Parses("CREATE UNIQUE INDEX name ON table_name ( ( expression ) COLLATE en_US DESC , ( expression ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
+		Converts("CREATE UNIQUE INDEX name ON table_name ( ( expression ) COLLATE en_US DESC , ( expression ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST , column_name opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , column_name COLLATE en_US opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name USING method ( ( expression ) NULLS FIRST , column_name opclass NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
@@ -1705,7 +1705,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name USING method ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) , column_name opclass ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , column_name COLLATE en_US DESC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
-		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) ASC , column_name opclass ( opclass_parameter = value ) DESC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
+		Converts("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) ASC , column_name opclass ( opclass_parameter = value ) DESC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS LAST , ( expression ) NULLS LAST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON ONLY table_name ( column_name opclass , ( expression ) COLLATE en_US NULLS LAST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
 		Parses("CREATE UNIQUE INDEX ON table_name USING method ( column_name DESC NULLS FIRST , column_name COLLATE en_US opclass NULLS LAST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor )"),
@@ -1816,14 +1816,14 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , column_name opclass ( opclass_parameter = value ) DESC ) WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name ( column_name NULLS LAST , ( expression ) opclass ( opclass_parameter = value ) DESC ) WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name ( column_name COLLATE en_US DESC , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) WITH ( fillfactor , fillfactor = value )"),
-		Parses("CREATE INDEX ON ONLY table_name ( column_name COLLATE en_US opclass ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) WITH ( fillfactor , fillfactor = value )"),
+		Converts("CREATE INDEX ON ONLY table_name ( column_name COLLATE en_US opclass ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name USING method ( ( expression ) opclass , ( expression ) COLLATE en_US NULLS FIRST ) WITH ( fillfactor , fillfactor = value )"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC , column_name ASC NULLS FIRST ) WITH ( fillfactor , fillfactor = value )"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC , column_name ASC NULLS FIRST ) WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX name ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) ASC , column_name opclass ASC NULLS FIRST ) WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( column_name DESC , ( expression ) opclass ASC NULLS FIRST ) WITH ( fillfactor , fillfactor = value )"),
-		Parses("CREATE INDEX name ON table_name ( ( expression ) opclass ASC NULLS FIRST , column_name COLLATE en_US opclass ASC NULLS FIRST ) WITH ( fillfactor , fillfactor = value )"),
+		Converts("CREATE INDEX name ON table_name ( ( expression ) opclass ASC NULLS FIRST , column_name COLLATE en_US opclass ASC NULLS FIRST ) WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST , column_name opclass ( opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor , fillfactor = value )"),
-		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC , ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor , fillfactor = value )"),
+		Converts("CREATE UNIQUE INDEX ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC , ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name ( column_name opclass ( opclass_parameter = value ) ASC NULLS LAST , ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , ( expression ) DESC NULLS FIRST ) WITH ( fillfactor , fillfactor = value )"),
@@ -1931,7 +1931,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( column_name DESC NULLS LAST , column_name opclass ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Converts("CREATE INDEX ON table_name ( column_name opclass ( opclass_parameter = value ) NULLS FIRST , column_name COLLATE en_US opclass ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST , column_name opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
-		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
+		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name ( column_name DESC , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , column_name ASC ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
@@ -1949,7 +1949,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX name ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX name ON ONLY table_name USING method ( ( expression ) ASC NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass DESC NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass DESC NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST , ( expression ) COLLATE en_US ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC , column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass DESC NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value )"),
@@ -2066,7 +2066,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name ( ( expression ) COLLATE en_US opclass ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ASC NULLS FIRST , column_name ASC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Converts("CREATE UNIQUE INDEX ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST , column_name COLLATE en_US ASC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
-		Parses("CREATE INDEX name ON table_name ( column_name ASC NULLS FIRST , ( expression ) COLLATE en_US ASC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
+		Converts("CREATE INDEX name ON table_name ( column_name ASC NULLS FIRST , ( expression ) COLLATE en_US ASC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name USING method ( ( expression ) opclass ASC , column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST , ( expression ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
@@ -2080,17 +2080,17 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST , ( expression ) COLLATE en_US opclass NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX name ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS LAST , ( expression ) COLLATE en_US opclass NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name ( column_name opclass NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
-		Parses("CREATE UNIQUE INDEX ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) , column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
+		Converts("CREATE UNIQUE INDEX ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) , column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX ON ONLY table_name USING method ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) , column_name opclass ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) ASC , column_name opclass ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( column_name opclass NULLS FIRST , column_name opclass ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( column_name opclass ( opclass_parameter = value ) , column_name COLLATE en_US opclass ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( column_name opclass ( opclass_parameter = value ) DESC NULLS FIRST , column_name opclass ( opclass_parameter = value ) ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
-		Parses("CREATE UNIQUE INDEX name ON table_name ( column_name COLLATE en_US opclass ASC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
-		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
+		Converts("CREATE UNIQUE INDEX name ON table_name ( column_name COLLATE en_US opclass ASC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
+		Converts("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC , column_name DESC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX ON ONLY table_name USING method ( ( expression ) opclass NULLS FIRST , column_name DESC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
-		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name opclass , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
+		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name opclass , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , column_name NULLS LAST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name USING method ( ( expression ) opclass NULLS FIRST , ( expression ) NULLS LAST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value )"),
@@ -2192,26 +2192,26 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name ( column_name COLLATE en_US opclass , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , ( expression ) COLLATE en_US ASC ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( column_name COLLATE en_US , column_name opclass ASC ) WITH ( fillfactor = value , fillfactor = value )"),
-		Parses("CREATE INDEX ON table_name ( column_name opclass DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) ASC ) WITH ( fillfactor = value , fillfactor = value )"),
+		Converts("CREATE INDEX ON table_name ( column_name opclass DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) ASC ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( ( expression ) COLLATE en_US , column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE INDEX ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass , column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC , ( expression ) COLLATE en_US opclass DESC ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name USING method ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC ) WITH ( fillfactor = value , fillfactor = value )"),
-		Parses("CREATE UNIQUE INDEX ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) WITH ( fillfactor = value , fillfactor = value )"),
+		Converts("CREATE UNIQUE INDEX ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name USING method ( column_name opclass ( opclass_parameter = value ) DESC NULLS FIRST , ( expression ) NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
-		Parses("CREATE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US ASC , column_name COLLATE en_US NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
+		Converts("CREATE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US ASC , column_name COLLATE en_US NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name ( ( expression ) opclass , column_name opclass NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
 		Converts("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US NULLS FIRST , column_name opclass NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
-		Parses("CREATE UNIQUE INDEX name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , ( expression ) COLLATE en_US opclass NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
+		Converts("CREATE UNIQUE INDEX name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , ( expression ) COLLATE en_US opclass NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name USING method ( ( expression ) opclass ASC NULLS FIRST , ( expression ) COLLATE en_US opclass NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US ASC NULLS LAST , column_name opclass ( opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( column_name DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
-		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name opclass ( opclass_parameter = value ) DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
+		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name opclass ( opclass_parameter = value ) DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US opclass NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX ON table_name USING method ( ( expression ) COLLATE en_US , column_name ASC NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
-		Parses("CREATE INDEX ON ONLY table_name ( column_name COLLATE en_US opclass DESC , ( expression ) COLLATE en_US ASC NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
+		Converts("CREATE INDEX ON ONLY table_name ( column_name COLLATE en_US opclass DESC , ( expression ) COLLATE en_US ASC NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name COLLATE en_US opclass ASC NULLS LAST , ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US DESC NULLS LAST , ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , ( expression ) COLLATE en_US DESC NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value )"),
@@ -2327,11 +2327,11 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX ON ONLY table_name ( column_name ASC NULLS LAST , ( expression ) COLLATE en_US opclass ASC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
 		Converts("CREATE INDEX IF NOT EXISTS name ON table_name ( column_name opclass ( opclass_parameter = value ) NULLS FIRST , column_name opclass ( opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
-		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST , ( expression ) DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value ) , column_name COLLATE en_US DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
+		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST , ( expression ) DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value ) , column_name COLLATE en_US DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( ( expression ) opclass ASC NULLS FIRST , ( expression ) COLLATE en_US DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE INDEX name ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
-		Parses("CREATE INDEX ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
+		Converts("CREATE INDEX ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name USING method ( column_name COLLATE en_US opclass NULLS LAST , column_name NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) DESC NULLS LAST , column_name NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
@@ -2472,7 +2472,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , column_name opclass ( opclass_parameter = value ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) opclass DESC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) , column_name NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
-		Parses("CREATE UNIQUE INDEX ON table_name ( column_name , ( expression ) opclass NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
+		Converts("CREATE UNIQUE INDEX ON table_name ( column_name , ( expression ) opclass NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name USING method ( column_name opclass ( opclass_parameter = value ) , ( expression ) opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( column_name COLLATE en_US opclass ASC NULLS LAST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value )"),
@@ -2600,9 +2600,9 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST , column_name COLLATE en_US ASC NULLS FIRST ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC , column_name opclass ASC NULLS FIRST ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) , ( expression ) COLLATE en_US opclass ASC NULLS FIRST ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON table_name ( column_name opclass ( opclass_parameter = value ) DESC , ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON table_name ( column_name opclass ( opclass_parameter = value ) DESC , ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX ON table_name USING method ( ( expression ) DESC NULLS FIRST , column_name COLLATE en_US DESC NULLS FIRST ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name opclass ( opclass_parameter = value ) DESC NULLS FIRST , ( expression ) opclass DESC NULLS FIRST ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name opclass ( opclass_parameter = value ) DESC NULLS FIRST , ( expression ) opclass DESC NULLS FIRST ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST ) TABLESPACE tablespace_name"),
@@ -2717,7 +2717,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass DESC , column_name COLLATE en_US ASC NULLS FIRST ) NULLS DISTINCT TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( column_name COLLATE en_US opclass DESC NULLS LAST , ( expression ) COLLATE en_US opclass ASC NULLS FIRST ) NULLS DISTINCT TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC , column_name opclass ( opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX name ON table_name ( column_name COLLATE en_US opclass NULLS LAST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( ( expression ) DESC , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT TABLESPACE tablespace_name"),
@@ -2813,7 +2813,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value ) ASC NULLS LAST , ( expression ) opclass ( opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS DISTINCT TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name USING method ( ( expression ) DESC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS DISTINCT TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name USING method ( ( expression ) opclass NULLS FIRST , column_name opclass ) NULLS NOT DISTINCT TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) , ( expression ) COLLATE en_US opclass ) NULLS NOT DISTINCT TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) , ( expression ) COLLATE en_US opclass ) NULLS NOT DISTINCT TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ASC , column_name opclass ( opclass_parameter = value ) ) NULLS NOT DISTINCT TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) ASC NULLS LAST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( ( expression ) NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT TABLESPACE tablespace_name"),
@@ -2927,9 +2927,9 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS NOT DISTINCT TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX name ON ONLY table_name ( ( expression ) COLLATE en_US opclass DESC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS NOT DISTINCT TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS NOT DISTINCT TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) , ( expression ) COLLATE en_US ) WITH ( fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) , ( expression ) COLLATE en_US ) WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON table_name USING method ( ( expression ) COLLATE en_US ASC NULLS FIRST , column_name opclass ) WITH ( fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX name ON table_name ( ( expression ) opclass DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) ) WITH ( fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX name ON table_name ( ( expression ) opclass DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) ) WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ) WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX name ON table_name USING method ( column_name COLLATE en_US ASC NULLS FIRST , column_name ASC ) WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX name ON table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , ( expression ) ASC ) WITH ( fillfactor ) TABLESPACE tablespace_name"),
@@ -3049,7 +3049,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name USING method ( ( expression ) opclass DESC NULLS LAST , column_name COLLATE en_US ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , column_name opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) opclass ASC NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) , column_name ASC ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) , column_name ASC ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ASC NULLS LAST , column_name ASC ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( ( expression ) DESC , ( expression ) ASC ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name ( ( expression ) COLLATE en_US opclass NULLS FIRST , column_name COLLATE en_US ASC ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
@@ -3059,11 +3059,11 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name ( column_name opclass NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( column_name opclass ( opclass_parameter = value ) ASC , column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name COLLATE en_US DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name COLLATE en_US DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name USING method ( column_name opclass ( opclass_parameter = value ) DESC , column_name DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( column_name COLLATE en_US NULLS LAST , ( expression ) opclass DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name opclass , column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX name ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX name ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US opclass , ( expression ) COLLATE en_US NULLS LAST ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( column_name opclass ASC , ( expression ) COLLATE en_US NULLS LAST ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name USING method ( column_name opclass ASC NULLS FIRST , ( expression ) COLLATE en_US NULLS LAST ) NULLS DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
@@ -3157,9 +3157,9 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name USING method ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON ONLY table_name ( ( expression ) , ( expression ) COLLATE en_US ) NULLS NOT DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC , column_name COLLATE en_US ASC ) NULLS NOT DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC , column_name COLLATE en_US ASC ) NULLS NOT DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX name ON table_name ( ( expression ) opclass DESC NULLS LAST , column_name COLLATE en_US opclass ASC ) NULLS NOT DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON table_name ( column_name COLLATE en_US DESC , ( expression ) COLLATE en_US opclass ASC ) NULLS NOT DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON table_name ( column_name COLLATE en_US DESC , ( expression ) COLLATE en_US opclass ASC ) NULLS NOT DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST , ( expression ) COLLATE en_US opclass ASC ) NULLS NOT DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name USING method ( ( expression ) COLLATE en_US ASC NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name USING method ( column_name opclass , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor ) TABLESPACE tablespace_name"),
@@ -3302,7 +3302,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name USING method ( ( expression ) COLLATE en_US ASC , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX ON table_name ( ( expression ) opclass NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX ON table_name ( ( expression ) opclass NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) , column_name ASC NULLS FIRST ) WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC , ( expression ) COLLATE en_US ASC NULLS FIRST ) WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( column_name opclass ASC NULLS FIRST , column_name COLLATE en_US opclass ASC NULLS FIRST ) WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
@@ -3397,7 +3397,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name USING method ( column_name COLLATE en_US opclass DESC , column_name opclass DESC NULLS LAST ) INCLUDE ( column_name , column_name ) WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name ( ( expression ) opclass , column_name opclass ( opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US DESC NULLS FIRST , ( expression ) ) NULLS DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US DESC NULLS FIRST , ( expression ) ) NULLS DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US ASC NULLS LAST , column_name opclass ) NULLS DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name USING method ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) , ( expression ) ASC ) NULLS DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX ON table_name USING method ( column_name opclass NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
@@ -3405,7 +3405,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name ( column_name COLLATE en_US opclass DESC NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( ( expression ) opclass ( opclass_parameter = value ) ASC , ( expression ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON ONLY table_name USING method ( column_name COLLATE en_US NULLS FIRST , ( expression ) COLLATE en_US opclass NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX name ON table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON table_name USING method ( column_name opclass ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON ONLY table_name USING method ( column_name opclass NULLS LAST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
@@ -3524,9 +3524,9 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX ON ONLY table_name ( ( expression ) ASC NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( ( expression ) COLLATE en_US opclass , column_name opclass ( opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( column_name COLLATE en_US opclass DESC , column_name COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX ON table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX ON table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( column_name COLLATE en_US NULLS FIRST , column_name COLLATE en_US ASC ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON table_name ( ( expression ) opclass ASC NULLS FIRST , column_name opclass ( opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON table_name ( ( expression ) opclass ASC NULLS FIRST , column_name opclass ( opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name ( column_name opclass ( opclass_parameter = value ) ASC NULLS FIRST , ( expression ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( column_name COLLATE en_US NULLS LAST , ( expression ) opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name ( column_name opclass ASC NULLS LAST , ( expression ) opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
@@ -3545,7 +3545,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( column_name ASC , column_name COLLATE en_US opclass ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name USING method ( ( expression ) ASC NULLS LAST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) opclass ASC NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( ( expression ) opclass DESC , ( expression ) DESC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , ( expression ) COLLATE en_US DESC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name ( ( expression ) COLLATE en_US ASC NULLS FIRST , column_name COLLATE en_US opclass DESC NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value ) TABLESPACE tablespace_name"),
@@ -3629,12 +3629,12 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX ON ONLY table_name USING method ( ( expression ) COLLATE en_US NULLS FIRST ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) , ( expression ) opclass ( opclass_parameter = value ) ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name ( ( expression ) ASC , ( expression ) opclass ( opclass_parameter = value ) ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name ( ( expression ) opclass NULLS FIRST , column_name COLLATE en_US DESC ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX ON table_name ( ( expression ) opclass ( opclass_parameter = value ) DESC , ( expression ) COLLATE en_US DESC ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX ON table_name ( ( expression ) opclass ( opclass_parameter = value ) DESC , ( expression ) COLLATE en_US DESC ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC , ( expression ) opclass ( opclass_parameter = value ) DESC ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( ( expression ) COLLATE en_US , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) opclass ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
@@ -3642,7 +3642,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name USING method ( ( expression ) COLLATE en_US DESC , column_name NULLS FIRST ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) , column_name COLLATE en_US opclass NULLS FIRST ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name USING method ( column_name COLLATE en_US opclass DESC , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name ( column_name COLLATE en_US opclass DESC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
@@ -3751,9 +3751,9 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX name ON table_name USING method ( ( expression ) NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( column_name opclass ( opclass_parameter = value ) NULLS LAST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST , ( expression ) COLLATE en_US ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , column_name opclass ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , column_name opclass ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC , ( expression ) opclass ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ASC NULLS FIRST , column_name opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ASC NULLS FIRST , column_name opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name ( column_name opclass NULLS LAST , column_name opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name USING method ( ( expression ) opclass ASC , ( expression ) opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name USING method ( column_name opclass DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
@@ -3761,24 +3761,24 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value ) DESC NULLS LAST , ( expression ) ASC ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) DESC , ( expression ) COLLATE en_US opclass ASC ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC , ( expression ) COLLATE en_US DESC ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS LAST , ( expression ) opclass DESC ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON ONLY table_name USING method ( column_name COLLATE en_US ASC , column_name COLLATE en_US opclass DESC ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST , column_name opclass ( opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON table_name ( ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON table_name ( ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name USING method ( column_name COLLATE en_US NULLS FIRST , ( expression ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST , column_name COLLATE en_US opclass NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST , column_name opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON table_name ( column_name COLLATE en_US ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON table_name ( column_name COLLATE en_US ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX ON table_name USING method ( column_name opclass ( opclass_parameter = value ) ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX name ON table_name USING method ( column_name COLLATE en_US NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , ( expression ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX ON table_name ( column_name DESC NULLS FIRST , ( expression ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX ON table_name ( column_name DESC NULLS FIRST , ( expression ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass DESC , ( expression ) COLLATE en_US ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX name ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , ( expression ) COLLATE en_US opclass ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX name ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , ( expression ) COLLATE en_US opclass ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name USING method ( ( expression ) ASC NULLS LAST , ( expression ) COLLATE en_US opclass ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) ASC NULLS LAST , column_name opclass DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name opclass ( opclass_parameter = value ) DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
@@ -3869,22 +3869,22 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name USING method ( column_name COLLATE en_US NULLS LAST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON table_name USING method ( column_name opclass ( opclass_parameter = value ) NULLS LAST , column_name ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name USING method ( column_name opclass ( opclass_parameter = value ) , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON table_name ( ( expression ) opclass ASC , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON table_name ( ( expression ) opclass ASC , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON ONLY table_name ( ( expression ) , ( expression ) COLLATE en_US ASC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) COLLATE en_US DESC NULLS LAST , column_name DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST , column_name DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX name ON table_name ( ( expression ) COLLATE en_US opclass ASC , ( expression ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US DESC , ( expression ) opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX name ON table_name ( ( expression ) COLLATE en_US opclass ASC , ( expression ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US DESC , ( expression ) opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX ON table_name USING method ( column_name COLLATE en_US opclass ASC , column_name COLLATE en_US opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS LAST , ( expression ) opclass ( opclass_parameter = value ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS LAST , ( expression ) opclass ( opclass_parameter = value ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name ( column_name opclass DESC , column_name COLLATE en_US NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX name ON table_name ( ( expression ) COLLATE en_US opclass NULLS FIRST , ( expression ) COLLATE en_US opclass NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX name ON table_name ( ( expression ) COLLATE en_US opclass NULLS FIRST , ( expression ) COLLATE en_US opclass NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) , column_name opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( ( expression ) opclass ASC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor ) TABLESPACE tablespace_name"),
@@ -4112,31 +4112,31 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name ( ( expression ) COLLATE en_US ASC NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST ) INCLUDE ( column_name , column_name ) WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) COLLATE en_US ASC NULLS FIRST , column_name COLLATE en_US opclass DESC NULLS LAST ) INCLUDE ( column_name , column_name ) WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX name ON table_name ( ( expression ) opclass ( opclass_parameter = value ) , column_name ASC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX name ON table_name ( ( expression ) opclass ( opclass_parameter = value ) , column_name ASC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX ON table_name USING method ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , column_name opclass ASC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , column_name COLLATE en_US opclass ASC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( column_name DESC NULLS LAST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) opclass NULLS FIRST , column_name DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) opclass NULLS FIRST , column_name DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC , column_name COLLATE en_US DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST , column_name COLLATE en_US opclass DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS FIRST , column_name COLLATE en_US opclass DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Converts("CREATE INDEX IF NOT EXISTS name ON table_name ( column_name COLLATE en_US opclass DESC NULLS FIRST , column_name COLLATE en_US opclass DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , ( expression ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , ( expression ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( ( expression ) COLLATE en_US opclass DESC NULLS FIRST , ( expression ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS LAST , column_name opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX name ON ONLY table_name ( column_name COLLATE en_US opclass , ( expression ) opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX name ON ONLY table_name ( column_name COLLATE en_US opclass , ( expression ) opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST , ( expression ) opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX ON table_name USING method ( ( expression ) opclass DESC NULLS LAST , column_name ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON ONLY table_name USING method ( column_name opclass ASC NULLS FIRST , ( expression ) opclass ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) COLLATE en_US opclass DESC , column_name COLLATE en_US opclass ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( ( expression ) COLLATE en_US opclass DESC , column_name COLLATE en_US opclass ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST , column_name COLLATE en_US opclass ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) DESC , ( expression ) COLLATE en_US opclass ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name USING method ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST , ( expression ) COLLATE en_US opclass ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , column_name opclass DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US DESC , column_name COLLATE en_US opclass DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , column_name COLLATE en_US opclass DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US DESC , column_name COLLATE en_US opclass DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX ON table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , column_name COLLATE en_US opclass DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( column_name NULLS LAST , ( expression ) COLLATE en_US opclass DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name ( column_name DESC NULLS LAST , ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( column_name opclass NULLS LAST , column_name COLLATE en_US NULLS LAST ) NULLS DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
@@ -4237,8 +4237,8 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON ONLY table_name ( ( expression ) COLLATE en_US , column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( column_name opclass ( opclass_parameter = value ) ASC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST , ( expression ) COLLATE en_US DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) , ( expression ) opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) , ( expression ) opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name ( column_name COLLATE en_US ASC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name USING method ( ( expression ) DESC , column_name COLLATE en_US opclass NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON table_name USING method ( ( expression ) COLLATE en_US opclass DESC NULLS FIRST , column_name COLLATE en_US opclass NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor ) TABLESPACE tablespace_name"),
@@ -4366,7 +4366,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX ON table_name USING method ( ( expression ) COLLATE en_US DESC NULLS LAST , ( expression ) ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name ( column_name DESC NULLS LAST , ( expression ) COLLATE en_US ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST , ( expression ) opclass ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON table_name ( column_name COLLATE en_US opclass NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON table_name ( column_name COLLATE en_US opclass NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name USING method ( column_name opclass ( opclass_parameter = value ) ASC NULLS LAST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
@@ -4380,16 +4380,16 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST , ( expression ) COLLATE en_US DESC ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , ( expression ) COLLATE en_US opclass DESC ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX ON table_name ( ( expression ) COLLATE en_US opclass DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX ON table_name ( ( expression ) COLLATE en_US opclass DESC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Converts("CREATE INDEX ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC , column_name NULLS FIRST ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) NULLS FIRST , column_name COLLATE en_US NULLS FIRST ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name USING method ( ( expression ) ASC , column_name ASC NULLS FIRST ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST , column_name opclass DESC NULLS FIRST ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , ( expression ) opclass DESC NULLS FIRST ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , ( expression ) opclass DESC NULLS FIRST ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name USING method ( column_name COLLATE en_US opclass DESC , column_name opclass ( opclass_parameter = value ) DESC NULLS FIRST ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) , ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) , ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US ASC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) , ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US ASC NULLS FIRST , ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON ONLY table_name USING method ( column_name , column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX name ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS FIRST , column_name COLLATE en_US NULLS LAST ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST ) WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
@@ -4482,14 +4482,14 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name ( column_name opclass ASC NULLS FIRST , ( expression ) ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Converts("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC , column_name COLLATE en_US ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX ON table_name ( ( expression ) COLLATE en_US ASC NULLS LAST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX name ON ONLY table_name ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name USING method ( column_name ASC NULLS FIRST , column_name opclass ( opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name ( column_name opclass DESC NULLS LAST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name ( column_name NULLS LAST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX name ON ONLY table_name USING method ( ( expression ) COLLATE en_US NULLS LAST , column_name DESC ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Converts("CREATE UNIQUE INDEX ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS FIRST , column_name opclass DESC ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name ( ( expression ) opclass ( opclass_parameter = value ) DESC NULLS FIRST , column_name opclass DESC ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US NULLS FIRST , ( expression ) COLLATE en_US opclass DESC ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US NULLS FIRST , ( expression ) COLLATE en_US opclass DESC ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( ( expression ) COLLATE en_US NULLS FIRST , column_name COLLATE en_US opclass NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON ONLY table_name ( column_name COLLATE en_US opclass DESC NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US NULLS LAST , ( expression ) ASC NULLS FIRST ) NULLS DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
@@ -4612,7 +4612,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) , column_name DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name USING method ( column_name COLLATE en_US opclass , ( expression ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX name ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) DESC , ( expression ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX name ON table_name ( ( expression ) opclass ( opclass_parameter = value ) ASC , column_name COLLATE en_US DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX name ON table_name ( ( expression ) opclass ( opclass_parameter = value ) ASC , column_name COLLATE en_US DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name USING method ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) , ( expression ) opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) DESC NULLS LAST , ( expression ) opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ASC NULLS LAST , column_name COLLATE en_US opclass DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
@@ -4620,7 +4620,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY ON ONLY table_name ( ( expression ) opclass ASC , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX ON ONLY table_name ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , column_name COLLATE en_US NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX name ON table_name ( column_name COLLATE en_US DESC , ( expression ) opclass NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX name ON table_name ( column_name COLLATE en_US DESC , ( expression ) opclass NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name USING method ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST , ( expression ) COLLATE en_US opclass NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX name ON table_name USING method ( ( expression ) opclass DESC NULLS LAST , column_name opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
@@ -4717,12 +4717,12 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX name ON ONLY table_name USING method ( column_name DESC , ( expression ) COLLATE en_US opclass ASC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) opclass DESC NULLS FIRST , ( expression ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON ONLY table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST ) INCLUDE ( column_name , column_name ) NULLS NOT DISTINCT WITH ( fillfactor , fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass DESC NULLS FIRST , ( expression ) COLLATE en_US ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass DESC NULLS FIRST , ( expression ) COLLATE en_US ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value ) ASC NULLS LAST , ( expression ) opclass ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name COLLATE en_US NULLS LAST , ( expression ) COLLATE en_US opclass ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass ASC , column_name opclass ( opclass_parameter = value ) ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON table_name ( ( expression ) COLLATE en_US opclass ASC , column_name opclass ( opclass_parameter = value ) ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY name ON table_name USING method ( column_name ASC , ( expression ) opclass ( opclass_parameter = value ) ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX name ON table_name ( ( expression ) COLLATE en_US DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX name ON table_name ( ( expression ) COLLATE en_US DESC , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON ONLY table_name ( column_name opclass ( opclass_parameter = value ) DESC NULLS FIRST , column_name ASC ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Converts("CREATE UNIQUE INDEX name ON ONLY table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , column_name COLLATE en_US ASC ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX name ON ONLY table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , ( expression ) COLLATE en_US opclass ASC ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
@@ -4736,8 +4736,8 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE UNIQUE INDEX ON table_name USING method ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) , column_name opclass ( opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY IF NOT EXISTS name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) DESC NULLS LAST , column_name ASC NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC , ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) DESC NULLS FIRST , column_name DESC NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX ON ONLY table_name ( column_name opclass ( opclass_parameter = value , opclass_parameter = value ) DESC , ( expression ) opclass ( opclass_parameter = value ) ASC NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE INDEX IF NOT EXISTS name ON ONLY table_name ( ( expression ) DESC NULLS FIRST , column_name DESC NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX CONCURRENTLY name ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value ) NULLS FIRST , column_name COLLATE en_US DESC NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name ( ( expression ) opclass DESC , ( expression ) COLLATE en_US opclass DESC NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX name ON table_name ( column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) NULLS LAST , ( expression ) COLLATE en_US opclass DESC NULLS FIRST ) WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
@@ -4977,7 +4977,7 @@ func TestCreateIndex(t *testing.T) {
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name USING method ( column_name opclass DESC NULLS FIRST , column_name COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name USING method ( column_name COLLATE en_US opclass , ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX IF NOT EXISTS name ON table_name USING method ( column_name COLLATE en_US opclass , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
-		Parses("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) opclass DESC NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
+		Converts("CREATE UNIQUE INDEX IF NOT EXISTS name ON table_name ( ( expression ) opclass DESC NULLS FIRST , column_name opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE INDEX CONCURRENTLY ON ONLY table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON table_name USING method ( ( expression ) opclass ( opclass_parameter = value , opclass_parameter = value ) ASC NULLS LAST , column_name COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
 		Parses("CREATE UNIQUE INDEX ON table_name USING method ( ( expression ) COLLATE en_US opclass ( opclass_parameter = value ) NULLS FIRST , ( expression ) COLLATE en_US opclass ( opclass_parameter = value , opclass_parameter = value ) ) NULLS NOT DISTINCT WITH ( fillfactor = value , fillfactor = value ) TABLESPACE tablespace_name"),
diff --git a/testing/go/enginetest/doltgres_engine_test.go b/testing/go/enginetest/doltgres_engine_test.go
index 1f8e94d1f8..89da9e35e1 100755
--- a/testing/go/enginetest/doltgres_engine_test.go
+++ b/testing/go/enginetest/doltgres_engine_test.go
@@ -792,6 +792,12 @@ func TestIndexes(t *testing.T) {
 	enginetest.TestIndexes(t, harness)
 }
 
+func TestIndexedExpressions(t *testing.T) {
+	harness := newDoltgresServerHarness(t)
+	defer harness.Close()
+	enginetest.TestIndexedExpressions(t, harness)
+}
+
 func TestIndexPrefix(t *testing.T) {
 	t.Skip()
 	harness := newDoltgresServerHarness(t)
diff --git a/testing/go/enginetest/doltgres_harness_test.go b/testing/go/enginetest/doltgres_harness_test.go
index b1e2e170c5..a442147703 100644
--- a/testing/go/enginetest/doltgres_harness_test.go
+++ b/testing/go/enginetest/doltgres_harness_test.go
@@ -113,12 +113,23 @@ var defaultSkippedQueries = []string{
 	"show create table fk_tbl",   // we create an extra key for the FK that vanilla gms does not
 	"show indexes from",          // we create / expose extra indexes (for foreign keys)
 	"show global variables like", // we set extra variables
+	"show columns from",          // MySQL SHOW variant with no PostgreSQL equivalent
+	"show extended columns from", // MySQL SHOW variant with no PostgreSQL equivalent
+
 	// unsupported doltgres syntax
 	// " WITH ",
 	// " OVER ",
 	// string functions are broken due to incompatible types
 	"HEX(",
 	"TO_BASE64(",
+	// MySQL-specific functions not supported in doltgresql
+	"json_unquote", // MySQL JSON function
+	"year(",        // YEAR() functional index hits a type-incompatibility in doltgresql
+
+	// MySQL-specific operators and syntax not supported in PostgreSQL
+	"<=>",           // null-safe equality (PostgreSQL uses IS NOT DISTINCT FROM)
+	"modify column", // MySQL ALTER TABLE MODIFY COLUMN syntax
+	"column first",  // MySQL ADD COLUMN ... FIRST positioning
 }
 
 // Setup sets the setup scripts for this DoltHarness's engine
@@ -729,6 +740,10 @@ func getDmlResult(rows pgx.Rows, query string) (sql.Row, bool) {
 		return sql.NewRow(gmstypes.NewOkResult(0)), true
 	case strings.HasPrefix(tag.String(), "ALTER TABLE"):
 		return sql.NewRow(gmstypes.NewOkResult(0)), true
+	case strings.HasPrefix(tag.String(), "CREATE INDEX"):
+		return sql.NewRow(gmstypes.NewOkResult(0)), true
+	case strings.HasPrefix(tag.String(), "DROP INDEX"):
+		return sql.NewRow(gmstypes.NewOkResult(0)), true
 	case strings.HasPrefix(tag.String(), "TRUNCATE"):
 		return sql.NewRow(gmstypes.NewOkResult(0)), true
 	case strings.HasPrefix(tag.String(), "SET"):
@@ -814,12 +829,15 @@ func unwrapResultColumn(v any) (any, error) {
 	}
 }
 
+// IsServerBacked implements enginetest.ServerBackedEngine, marking DoltgresQueryEngine
+// as a server-backed engine so that plan-inspection checks (evalIndexTest, etc.) are
+// skipped, matching the behavior of GMS's own ServerQueryEngine.
+func (d *DoltgresQueryEngine) IsServerBacked() bool { return true }
+
 func (d *DoltgresQueryEngine) EngineAnalyzer() *analyzer.Analyzer {
 	// TODO: this is a shim to get simple tests to work, we need to restructure the tests to not require access to
 	//  an analyzer
-	catalog := &analyzer.Catalog{}
-	catalog.AuthHandler = sql.GetAuthorizationHandlerFactory().CreateHandler(catalog)
-
+	catalog := analyzer.NewCatalog(nil, sql.EngineOverrides{})
 	return &analyzer.Analyzer{
 		Catalog: catalog,
 	}
diff --git a/testing/go/index_test.go b/testing/go/index_test.go
index d0982d2a0a..dfd9b78cde 100644
--- a/testing/go/index_test.go
+++ b/testing/go/index_test.go
@@ -1076,10 +1076,6 @@ func TestBasicIndexing(t *testing.T) {
 					// ignored warning-generating unsupported options
 					Query: "CREATE INDEX v1_idx ON test(v1 varchar_pattern_ops) WITH (storage_opt1 = foo) TABLESPACE tablespace_name;",
 				},
-				{
-					Query:       "CREATE INDEX v1_idx2 ON test( (concat(v1, v1)) ) ;",
-					ExpectedErr: "not yet supported",
-				},
 				{
 					Query:       "CREATE INDEX v1_idx2 ON test using hash (v1);",
 					ExpectedErr: "not yet supported",