Function ExecReScanProjectSet

src/backend/executor/nodeProjectSet.c:339–351

}

void
ExecReScanProjectSet(ProjectSetState *node)
{
	/* Forget any incompletely-evaluated SRFs */
	node->pending_srf_tuples = false;

	/*
	 * If chgParam of subnode is not null then plan will be re-scanned by
	 * first ExecProcNode.
	 */
	if (node->ps.lefttree->chgParam == NULL)
		ExecReScan(node->ps.lefttree);
}