Function ExecInitSeqScanForPartition

src/backend/executor/nodeSeqscan.c:176–236

}

SeqScanState *
ExecInitSeqScanForPartition(SeqScan *node, EState *estate,
							Relation currentRelation)
{
	SeqScanState *scanstate;

	/*
	 * Once upon a time it was possible to have an outerPlan of a SeqScan, but
	 * not any more.
	 */
	Assert(outerPlan(node) == NULL);
	Assert(innerPlan(node) == NULL);

	/*
	 * create state structure
	 */
	scanstate = makeNode(SeqScanState);
	scanstate->ss.ps.plan = (Plan *) node;
	scanstate->ss.ps.state = estate;
	scanstate->ss.ps.ExecProcNode = ExecSeqScan;

	/*
	 * Miscellaneous initialization
	 *
	 * create expression context for node
	 */
	ExecAssignExprContext(estate, &scanstate->ss.ps);

	/*
	 * open the scan relation
	 */
	scanstate->ss.ss_currentRelation = currentRelation;

	/* and create slot with the appropriate rowtype */
	ExecInitScanTupleSlot(estate, &scanstate->ss,
						  RelationGetDescr(scanstate->ss.ss_currentRelation),
						  table_slot_callbacks(scanstate->ss.ss_currentRelation));

	/*
	 * Initialize result type and projection.
	 */
	ExecInitResultTypeTL(&scanstate->ss.ps);
	ExecAssignScanProjectionInfo(&scanstate->ss);

	/*
	 * initialize child expressions
	 */
	scanstate->ss.ps.qual =
		ExecInitQual(node->plan.qual, (PlanState *) scanstate);

	/*
	 * check scan slot with bloom filters in seqscan node or not.
	 */
	if (gp_enable_runtime_filter_pushdown
		&& !estate->useMppParallelMode)
	{
		scanstate->filter_in_seqscan = true;
	}