Method formatMergeStatement

cmd/gosqlx/cmd/sql_formatter.go:1270–1306

formatMergeStatement formats MERGE statements with proper indentation

(stmt *ast.MergeStatement)

// formatMergeStatement formats MERGE statements with proper indentation
func (f *SQLFormatter) formatMergeStatement(stmt *ast.MergeStatement) error {
	// MERGE INTO target_table
	f.writeKeyword("MERGE INTO")
	f.builder.WriteString(" ")
	f.formatTableReference(&stmt.TargetTable)
	if stmt.TargetAlias != "" {
		f.builder.WriteString(" " + stmt.TargetAlias)
	}

	// USING source_table
	f.writeNewline()
	f.writeKeyword("USING")
	f.builder.WriteString(" ")
	f.formatTableReference(&stmt.SourceTable)
	if stmt.SourceAlias != "" {
		f.builder.WriteString(" " + stmt.SourceAlias)
	}

	// ON condition
	if stmt.OnCondition != nil {
		f.writeNewline()
		f.writeKeyword("ON")
		f.builder.WriteString(" ")
		if err := f.formatExpression(stmt.OnCondition); err != nil {
			return fmt.Errorf("failed to format ON condition: %w", err)
		}
	}

	// WHEN clauses
	for _, whenClause := range stmt.WhenClauses {
		if err := f.formatMergeWhenClause(whenClause); err != nil {
			return fmt.Errorf("failed to format WHEN clause: %w", err)
		}
	}

	return nil
}

// formatMergeWhenClause formats a WHEN clause in a MERGE statement
func (f *SQLFormatter) formatMergeWhenClause(when *ast.MergeWhenClause) error {