Fix CursorDefinition.Select type and rename BooleanLikeExpression to LikePredicate (#40)

- Change CursorDefinition.Select from QueryExpression to *SelectStatement
- Rename JSON $type from BooleanLikeExpression to LikePredicate
- Add OdbcEscape field to BooleanLikeExpression struct
- Enable BaselinesCommon_SetVariableStatementTests and SetVariableStatementTests

Co-authored-by: Claude <noreply@anthropic.com>

Author: kyleconroy

ast/boolean_like_expression.go

@@ -6,6 +6,7 @@ type BooleanLikeExpression struct {
 	SecondExpression ScalarExpression
 	EscapeExpression ScalarExpression
 	NotDefined       bool
+	OdbcEscape       bool
 }
 
 func (b *BooleanLikeExpression) node()              {}

ast/set_variable_statement.go

@@ -17,8 +17,8 @@ func (s *SetVariableStatement) statement() {}
 
 // CursorDefinition represents a cursor definition.
 type CursorDefinition struct {
-	Options []*CursorOption `json:"Options,omitempty"`
-	Select  QueryExpression `json:"Select,omitempty"`
+	Options []*CursorOption  `json:"Options,omitempty"`
+	Select  *SelectStatement `json:"Select,omitempty"`
 }
 
 // CursorOption represents a cursor option like SCROLL or DYNAMIC.

parser/marshal.go

@@ -1663,7 +1663,7 @@ func booleanExpressionToJSON(expr ast.BooleanExpression) jsonNode {
 		return node
 	case *ast.BooleanLikeExpression:
 		node := jsonNode{
-			"$type": "BooleanLikeExpression",
+			"$type": "LikePredicate",
 		}
 		if e.FirstExpression != nil {
 			node["FirstExpression"] = scalarExpressionToJSON(e.FirstExpression)
@@ -1675,6 +1675,7 @@ func booleanExpressionToJSON(expr ast.BooleanExpression) jsonNode {
 			node["EscapeExpression"] = scalarExpressionToJSON(e.EscapeExpression)
 		}
 		node["NotDefined"] = e.NotDefined
+		node["OdbcEscape"] = e.OdbcEscape
 		return node
 	case *ast.BooleanTernaryExpression:
 		node := jsonNode{
@@ -2216,7 +2217,7 @@ func cursorDefinitionToJSON(cd *ast.CursorDefinition) jsonNode {
 		node["Options"] = opts
 	}
 	if cd.Select != nil {
-		node["Select"] = queryExpressionToJSON(cd.Select)
+		node["Select"] = selectStatementToJSON(cd.Select)
 	}
 	return node
 }
@@ -7552,12 +7553,7 @@ func declareCursorDefinitionToJSON(d *ast.CursorDefinition) jsonNode {
 		node["Options"] = opts
 	}
 	if d.Select != nil {
-		// For DeclareCursorStatement, we need to wrap the QueryExpression in a SelectStatement format
-		selectNode := jsonNode{
-			"$type":           "SelectStatement",
-			"QueryExpression": queryExpressionToJSON(d.Select),
-		}
-		node["Select"] = selectNode
+		node["Select"] = selectStatementToJSON(d.Select)
 	}
 	return node
 }

parser/parse_statements.go

@@ -846,7 +846,7 @@ func (p *Parser) parseSetVariableStatement() (ast.Statement, error) {
 			if err != nil {
 				return nil, err
 			}
-			cursorDef.Select = qe
+			cursorDef.Select = &ast.SelectStatement{QueryExpression: qe}
 		}
 		stmt.CursorDefinition = cursorDef
 	} else {
@@ -5838,13 +5838,12 @@ func (p *Parser) parseDeclareCursorStatementContinued(cursorName *ast.Identifier
 		p.nextToken()
 	}
 
-	// Parse SELECT statement and extract its QueryExpression
+	// Parse SELECT statement
 	selectStmt, err := p.parseSelectStatement()
 	if err != nil {
 		return nil, err
 	}
-	// CursorDefinition.Select is a QueryExpression, so we extract it from the SelectStatement
-	stmt.CursorDefinition.Select = selectStmt.QueryExpression
+	stmt.CursorDefinition.Select = selectStmt
 
 	// Skip optional semicolon
 	if p.curTok.Type == TokenSemicolon {

parser/testdata/BaselinesCommon_SetVariableStatementTests/metadata.json

@@ -1 +1 @@
-{"todo": true}
+{}

parser/testdata/SetVariableStatementTests/metadata.json

@@ -1 +1 @@
-{"todo": true}
+{}