Function ExecReScanSubqueryScan

src/backend/executor/nodeSubqueryscan.c:196–215

---------------------------------------------------------------- * ExecReScanSubqueryScan * * Rescans the relation. * ---------------------------------------------------------------- */

 * ----------------------------------------------------------------
 */
void
ExecReScanSubqueryScan(SubqueryScanState *node)
{
	ExecScanReScan(&node->ss);

	/*
	 * ExecReScan doesn't know about my subplan, so I have to do
	 * changed-parameter signaling myself.  This is just as well, because the
	 * subplan has its own memory context in which its chgParam state lives.
	 */
	if (node->ss.ps.chgParam != NULL)
		UpdateChangedParamSet(node->subplan, node->ss.ps.chgParam);

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

void
ExecSquelchSubqueryScan(SubqueryScanState *node, bool force)