Function ExecFindRowMark

src/backend/executor/execMain.c:3528–3542

* ExecFindRowMark -- find the ExecRowMark struct for given rangetable index * * If no such struct, either return NULL or throw error depending on missing_ok */

 * If no such struct, either return NULL or throw error depending on missing_ok
 */
ExecRowMark *
ExecFindRowMark(EState *estate, Index rti, bool missing_ok)
{
	if (rti > 0 && rti <= estate->es_range_table_size &&
		estate->es_rowmarks != NULL)
	{
		ExecRowMark *erm = estate->es_rowmarks[rti - 1];

		if (erm)
			return erm;
	}
	if (!missing_ok)
		elog(ERROR, "failed to find ExecRowMark for rangetable index %u", rti);
	return NULL;
}

/*
 * ExecBuildAuxRowMark -- create an ExecAuxRowMark struct