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Add parser features and enable 15 more tests
Features added: - String concat operator (||) and concat-equals (||=) - Compound assignment operators (+=, -=, *=, /=, %=, &=, |=, ^=) - CREATE WORKLOAD CLASSIFIER statement with options - SEND statement with multiple conversation handles - SelectSetVariable for SELECT @var = expr patterns Bug fixes: - Fixed NullLiteral value to use lowercase "null" - Fixed StringLiteral to always include Value field (even empty) - Fixed WorkloadGroup parameter types - Fixed SeparatorType output for NotSpecified Tests enabled: - StringConcatOperatorTests160 (2) - SendStatementTests110 (3) - AlterWorkloadGroupStatementSqlDwTests (2) - CreateWorkloadGroupStatementSqlDwTests130 (2) - AssignmentWithOperationTests (2) - CreateWorkloadClassifierStatementSqlDwTests (2) - FuzzyStringMatchingTests160 (2)
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67 files changed

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‎ast/select_set_variable.go‎

Lines changed: 12 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,12 @@
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package ast
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// SelectSetVariable represents a variable assignment in a SELECT statement.
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// Example: SELECT @a = 1, @b ||= 'foo'
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type SelectSetVariable struct {
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Variable *VariableReference `json:"Variable,omitempty"`
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Expression ScalarExpression `json:"Expression,omitempty"`
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AssignmentKind string `json:"AssignmentKind,omitempty"`
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}
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func (*SelectSetVariable) node() {}
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func (*SelectSetVariable) selectElement() {}

‎ast/workload_classifier_statement.go‎

Lines changed: 87 additions & 0 deletions
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@@ -0,0 +1,87 @@
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// Package ast provides AST types for T-SQL parsing.
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package ast
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// CreateWorkloadClassifierStatement represents a CREATE WORKLOAD CLASSIFIER statement.
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type CreateWorkloadClassifierStatement struct {
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ClassifierName *Identifier
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Options []WorkloadClassifierOption
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}
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func (s *CreateWorkloadClassifierStatement) statement() {}
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func (s *CreateWorkloadClassifierStatement) node() {}
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// WorkloadClassifierOption is the interface for workload classifier options.
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type WorkloadClassifierOption interface {
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node()
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workloadClassifierOption()
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}
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// ClassifierWorkloadGroupOption represents the WORKLOAD_GROUP option.
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type ClassifierWorkloadGroupOption struct {
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WorkloadGroupName *StringLiteral
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OptionType string
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}
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func (o *ClassifierWorkloadGroupOption) node() {}
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func (o *ClassifierWorkloadGroupOption) workloadClassifierOption() {}
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// ClassifierMemberNameOption represents the MEMBERNAME option.
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type ClassifierMemberNameOption struct {
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MemberName *StringLiteral
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OptionType string
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}
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func (o *ClassifierMemberNameOption) node() {}
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func (o *ClassifierMemberNameOption) workloadClassifierOption() {}
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// ClassifierWlmContextOption represents the WLM_CONTEXT option.
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type ClassifierWlmContextOption struct {
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WlmContext *StringLiteral
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OptionType string
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}
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func (o *ClassifierWlmContextOption) node() {}
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func (o *ClassifierWlmContextOption) workloadClassifierOption() {}
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// WlmTimeLiteral represents a time literal for WLM START_TIME/END_TIME options.
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type WlmTimeLiteral struct {
48+
TimeString *StringLiteral
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}
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func (t *WlmTimeLiteral) node() {}
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// ClassifierStartTimeOption represents the START_TIME option.
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type ClassifierStartTimeOption struct {
55+
Time *WlmTimeLiteral
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OptionType string
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}
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func (o *ClassifierStartTimeOption) node() {}
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func (o *ClassifierStartTimeOption) workloadClassifierOption() {}
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// ClassifierEndTimeOption represents the END_TIME option.
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type ClassifierEndTimeOption struct {
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Time *WlmTimeLiteral
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OptionType string
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}
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func (o *ClassifierEndTimeOption) node() {}
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func (o *ClassifierEndTimeOption) workloadClassifierOption() {}
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// ClassifierWlmLabelOption represents the WLM_LABEL option.
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type ClassifierWlmLabelOption struct {
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WlmLabel *StringLiteral
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OptionType string
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}
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func (o *ClassifierWlmLabelOption) node() {}
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func (o *ClassifierWlmLabelOption) workloadClassifierOption() {}
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// ClassifierImportanceOption represents the IMPORTANCE option.
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type ClassifierImportanceOption struct {
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Importance string
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OptionType string
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}
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func (o *ClassifierImportanceOption) node() {}
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func (o *ClassifierImportanceOption) workloadClassifierOption() {}

‎parser/lexer.go‎

Lines changed: 108 additions & 15 deletions
Original file line numberDiff line numberDiff line change
@@ -85,6 +85,19 @@ const (
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TokenRBrace
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TokenLeftShift
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TokenRightShift
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TokenPipe // |
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TokenDoublePipe // ||
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TokenConcatEquals // ||=
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TokenBitwiseAnd // &
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TokenPlusEquals // +=
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TokenMinusEquals // -=
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TokenStarEquals // *=
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TokenSlashEquals // /=
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TokenModuloEquals // %=
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TokenAndEquals // &=
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TokenOrEquals // |=
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TokenXorEquals // ^=
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TokenCaret // ^
88101

89102
// DML Keywords
90103
TokenInsert
@@ -265,9 +278,16 @@ func (l *Lexer) NextToken() Token {
265278
tok.Type = TokenEOF
266279
tok.Literal = ""
267280
case '*':
268-
tok.Type = TokenStar
269-
tok.Literal = "*"
270-
l.readChar()
281+
if l.peekChar() == '=' {
282+
l.readChar()
283+
tok.Type = TokenStarEquals
284+
tok.Literal = "*="
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l.readChar()
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} else {
287+
tok.Type = TokenStar
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tok.Literal = "*"
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l.readChar()
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}
271291
case ',':
272292
tok.Type = TokenComma
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tok.Literal = ","
@@ -355,21 +375,94 @@ func (l *Lexer) NextToken() Token {
355375
tok.Literal = "}"
356376
l.readChar()
357377
case '+':
358-
tok.Type = TokenPlus
359-
tok.Literal = "+"
360-
l.readChar()
378+
if l.peekChar() == '=' {
379+
l.readChar()
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tok.Type = TokenPlusEquals
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tok.Literal = "+="
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l.readChar()
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} else {
384+
tok.Type = TokenPlus
385+
tok.Literal = "+"
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l.readChar()
387+
}
361388
case '-':
362-
tok.Type = TokenMinus
363-
tok.Literal = "-"
364-
l.readChar()
389+
if l.peekChar() == '=' {
390+
l.readChar()
391+
tok.Type = TokenMinusEquals
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tok.Literal = "-="
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l.readChar()
394+
} else {
395+
tok.Type = TokenMinus
396+
tok.Literal = "-"
397+
l.readChar()
398+
}
365399
case '/':
366-
tok.Type = TokenSlash
367-
tok.Literal = "/"
368-
l.readChar()
400+
if l.peekChar() == '=' {
401+
l.readChar()
402+
tok.Type = TokenSlashEquals
403+
tok.Literal = "/="
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l.readChar()
405+
} else {
406+
tok.Type = TokenSlash
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tok.Literal = "/"
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l.readChar()
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}
369410
case '%':
370-
tok.Type = TokenModulo
371-
tok.Literal = "%"
372-
l.readChar()
411+
if l.peekChar() == '=' {
412+
l.readChar()
413+
tok.Type = TokenModuloEquals
414+
tok.Literal = "%="
415+
l.readChar()
416+
} else {
417+
tok.Type = TokenModulo
418+
tok.Literal = "%"
419+
l.readChar()
420+
}
421+
case '|':
422+
if l.peekChar() == '|' {
423+
l.readChar() // consume first |
424+
if l.peekChar() == '=' {
425+
l.readChar() // consume second |
426+
tok.Type = TokenConcatEquals
427+
tok.Literal = "||="
428+
l.readChar() // consume =
429+
} else {
430+
tok.Type = TokenDoublePipe
431+
tok.Literal = "||"
432+
l.readChar() // consume second |
433+
}
434+
} else if l.peekChar() == '=' {
435+
l.readChar()
436+
tok.Type = TokenOrEquals
437+
tok.Literal = "|="
438+
l.readChar()
439+
} else {
440+
tok.Type = TokenPipe
441+
tok.Literal = "|"
442+
l.readChar()
443+
}
444+
case '&':
445+
if l.peekChar() == '=' {
446+
l.readChar()
447+
tok.Type = TokenAndEquals
448+
tok.Literal = "&="
449+
l.readChar()
450+
} else {
451+
tok.Type = TokenBitwiseAnd
452+
tok.Literal = "&"
453+
l.readChar()
454+
}
455+
case '^':
456+
if l.peekChar() == '=' {
457+
l.readChar()
458+
tok.Type = TokenXorEquals
459+
tok.Literal = "^="
460+
l.readChar()
461+
} else {
462+
tok.Type = TokenCaret
463+
tok.Literal = "^"
464+
l.readChar()
465+
}
373466
case '\'':
374467
tok = l.readString()
375468
default:

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