fix: null tests including missing (#154)

Author: XuechunHHH

partiql-tests-data/eval/ion/primitives/null.ion

@@ -396,135 +396,135 @@
     }
   },
   {
-    name:"null comparison{sql:\"`null.null` = MISSING\",result:missing::null}",
+    name:"null comparison{sql:\"`null.null` = MISSING\",result:null}",
     statement:"`null.null` = MISSING",
     assert:{
       result:EvaluationSuccess,
       evalMode:[
         EvalModeCoerce,
         EvalModeError
       ],
-      output:$missing::null
+      output:null
     }
   },
   {
-    name:"null comparison{sql:\"`null.bool` = MISSING\",result:missing::null}",
+    name:"null comparison{sql:\"`null.bool` = MISSING\",result:null}",
     statement:"`null.bool` = MISSING",
     assert:{
       result:EvaluationSuccess,
       evalMode:[
         EvalModeCoerce,
         EvalModeError
       ],
-      output:$missing::null
+      output:null
     }
   },
   {
-    name:"null comparison{sql:\"`null.int` = MISSING\",result:missing::null}",
+    name:"null comparison{sql:\"`null.int` = MISSING\",result:null}",
     statement:"`null.int` = MISSING",
     assert:{
       result:EvaluationSuccess,
       evalMode:[
         EvalModeCoerce,
         EvalModeError
       ],
-      output:$missing::null
+      output:null
     }
   },
   {
-    name:"null comparison{sql:\"`null.decimal` = MISSING\",result:missing::null}",
+    name:"null comparison{sql:\"`null.decimal` = MISSING\",result:null}",
     statement:"`null.decimal` = MISSING",
     assert:{
       result:EvaluationSuccess,
       evalMode:[
         EvalModeCoerce,
         EvalModeError
       ],
-      output:$missing::null
+      output:null
     }
   },
   {
-    name:"null comparison{sql:\"`null.string` = MISSING\",result:missing::null}",
+    name:"null comparison{sql:\"`null.string` = MISSING\",result:null}",
     statement:"`null.string` = MISSING",
     assert:{
       result:EvaluationSuccess,
       evalMode:[
         EvalModeCoerce,
         EvalModeError
       ],
-      output:$missing::null
+      output:null
     }
   },
   {
-    name:"null comparison{sql:\"`null.symbol` = MISSING\",result:missing::null}",
+    name:"null comparison{sql:\"`null.symbol` = MISSING\",result:null}",
     statement:"`null.symbol` = MISSING",
     assert:{
       result:EvaluationSuccess,
       evalMode:[
         EvalModeCoerce,
         EvalModeError
       ],
-      output:$missing::null
+      output:null
     }
   },
   {
-    name:"null comparison{sql:\"`null.clob` = MISSING\",result:missing::null}",
+    name:"null comparison{sql:\"`null.clob` = MISSING\",result:null}",
     statement:"`null.clob` = MISSING",
     assert:{
       result:EvaluationSuccess,
       evalMode:[
         EvalModeCoerce,
         EvalModeError
       ],
-      output:$missing::null
+      output:null
     }
   },
   {
-    name:"null comparison{sql:\"`null.blob` = MISSING\",result:missing::null}",
+    name:"null comparison{sql:\"`null.blob` = MISSING\",result:null}",
     statement:"`null.blob` = MISSING",
     assert:{
       result:EvaluationSuccess,
       evalMode:[
         EvalModeCoerce,
         EvalModeError
       ],
-      output:$missing::null
+      output:null
     }
   },
   {
-    name:"null comparison{sql:\"`null.list` = MISSING\",result:missing::null}",
+    name:"null comparison{sql:\"`null.list` = MISSING\",result:null}",
     statement:"`null.list` = MISSING",
     assert:{
       result:EvaluationSuccess,
       evalMode:[
         EvalModeCoerce,
         EvalModeError
       ],
-      output:$missing::null
+      output:null
     }
   },
   {
-    name:"null comparison{sql:\"`null.struct` = MISSING\",result:missing::null}",
+    name:"null comparison{sql:\"`null.struct` = MISSING\",result:null}",
     statement:"`null.struct` = MISSING",
     assert:{
       result:EvaluationSuccess,
       evalMode:[
         EvalModeCoerce,
         EvalModeError
       ],
-      output:$missing::null
+      output:null
     }
   },
   {
-    name:"null comparison{sql:\"`null.sexp` = MISSING\",result:missing::null}",
+    name:"null comparison{sql:\"`null.sexp` = MISSING\",result:null}",
     statement:"`null.sexp` = MISSING",
     assert:{
       result:EvaluationSuccess,
       evalMode:[
         EvalModeCoerce,
         EvalModeError
       ],
-      output:$missing::null
+      output:null
     }
   }
 ]

partiql-tests-data/eval/primitives/null.ion

@@ -84,27 +84,27 @@
     }
   },
   {
-    name:"null comparison{sql:\"MISSING = NULL\",result:missing::null}",
+    name:"null comparison{sql:\"MISSING = NULL\",result:null}",
     statement:"MISSING = NULL",
     assert:{
       result:EvaluationSuccess,
       evalMode:[
         EvalModeCoerce,
         EvalModeError
       ],
-      output:$missing::null
+      output:null
     }
   },
   {
-    name:"null comparison{sql:\"NULL = MISSING\",result:missing::null}",
+    name:"null comparison{sql:\"NULL = MISSING\",result:null}",
     statement:"NULL = MISSING",
     assert:{
       result:EvaluationSuccess,
       evalMode:[
         EvalModeCoerce,
         EvalModeError
       ],
-      output:$missing::null
+      output:null
     }
   },
 ]