render method

@override String render(RenderContext context)

Renders this clause to SQL text, recording any bind values on context.

context is the entire context a clause is given: use RenderContext.escapeName for identifiers and RenderContext.param for values.

Return an empty string to render nothing, which is how an optional clause (such as a WHERE with no filter) drops itself from the statement.

Implementation

@override
String render(RenderContext context) {
  final rendered = terms.map((term) {
    final sql = switch (term) {
      final Expression<dynamic> expr => expr.build(),
      final Column<dynamic, Object?> column => SQL([column]),
      _ => throw UnsupportedError(
          'Unsupported GROUP BY term: ${term.runtimeType}',
        ),
    };
    return ExpressionClause(sql, singleTable: singleTable).render(context);
  });
  return 'GROUP BY ${rendered.join(', ')}';
}