Add TOP and OUTPUT clause parsing to DELETE statement

- Add TopRowFilter, OutputClause, OutputIntoClause fields to DeleteSpecification
- Parse TOP (expression) [PERCENT] clause in DELETE statement
- Parse OUTPUT and OUTPUT INTO clauses in DELETE statement
- Update deleteSpecificationToJSON to marshal new fields

Enables 2 tests: DeleteStatementTests90, Baselines90_DeleteStatementTests90

Author: claude

ast/delete_statement.go

@@ -12,7 +12,10 @@ func (d *DeleteStatement) statement() {}
 
 // DeleteSpecification contains the details of a DELETE.
 type DeleteSpecification struct {
-	Target      TableReference `json:"Target,omitempty"`
-	FromClause  *FromClause    `json:"FromClause,omitempty"`
-	WhereClause *WhereClause   `json:"WhereClause,omitempty"`
+	Target           TableReference    `json:"Target,omitempty"`
+	FromClause       *FromClause       `json:"FromClause,omitempty"`
+	WhereClause      *WhereClause      `json:"WhereClause,omitempty"`
+	TopRowFilter     *TopRowFilter     `json:"TopRowFilter,omitempty"`
+	OutputClause     *OutputClause     `json:"OutputClause,omitempty"`
+	OutputIntoClause *OutputIntoClause `json:"OutputIntoClause,omitempty"`
 }

parser/marshal.go

@@ -2598,6 +2598,15 @@ func deleteSpecificationToJSON(spec *ast.DeleteSpecification) jsonNode {
 	if spec.Target != nil {
 		node["Target"] = tableReferenceToJSON(spec.Target)
 	}
+	if spec.TopRowFilter != nil {
+		node["TopRowFilter"] = topRowFilterToJSON(spec.TopRowFilter)
+	}
+	if spec.OutputClause != nil {
+		node["OutputClause"] = outputClauseToJSON(spec.OutputClause)
+	}
+	if spec.OutputIntoClause != nil {
+		node["OutputIntoClause"] = outputIntoClauseToJSON(spec.OutputIntoClause)
+	}
 	return node
 }
 

parser/parse_dml.go

@@ -1369,6 +1369,15 @@ func (p *Parser) parseDeleteStatement() (*ast.DeleteStatement, error) {
 		DeleteSpecification: &ast.DeleteSpecification{},
 	}
 
+	// Parse optional TOP clause
+	if p.curTok.Type == TokenTop {
+		topRowFilter, err := p.parseTopRowFilter()
+		if err != nil {
+			return nil, err
+		}
+		stmt.DeleteSpecification.TopRowFilter = topRowFilter
+	}
+
 	// Skip optional FROM
 	if p.curTok.Type == TokenFrom {
 		p.nextToken()
@@ -1381,6 +1390,20 @@ func (p *Parser) parseDeleteStatement() (*ast.DeleteStatement, error) {
 	}
 	stmt.DeleteSpecification.Target = target
 
+	// Parse OUTPUT clauses (can have OUTPUT INTO followed by OUTPUT)
+	for p.curTok.Type == TokenIdent && strings.ToUpper(p.curTok.Literal) == "OUTPUT" {
+		outputClause, outputIntoClause, err := p.parseOutputClause()
+		if err != nil {
+			return nil, err
+		}
+		if outputIntoClause != nil {
+			stmt.DeleteSpecification.OutputIntoClause = outputIntoClause
+		}
+		if outputClause != nil {
+			stmt.DeleteSpecification.OutputClause = outputClause
+		}
+	}
+
 	// Parse optional FROM clause
 	if p.curTok.Type == TokenFrom {
 		fromClause, err := p.parseFromClause()

parser/testdata/Baselines90_DeleteStatementTests90/metadata.json

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

parser/testdata/DeleteStatementTests90/metadata.json

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