Method project

xtop/core/query_builder.py:479–482

(source: str, alias: str, column: str, output_alias: str, join_available: bool)

        )

        def project(source: str, alias: str, column: str, output_alias: str, join_available: bool) -> str:
            if not join_available:
                return f"NULL AS {output_alias}"
            return self._column_expr(source, alias, column, output_alias)

        # Add columns from joined sources (use NULL fallbacks when missing)
        if 'syscend' in required_sources: