Function ExecReScanLimit

src/backend/executor/nodeLimit.c:568–584

void
ExecReScanLimit(LimitState *node)
{
	/*
	 * Recompute limit/offset in case parameters changed, and reset the state
	 * machine.  We must do this before rescanning our child node, in case
	 * it's a Sort that we are passing the parameters down to.
	 */
	recompute_limits(node);

	/*
	 * 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);
}