Function ExecInitIndexScan

src/backend/executor/nodeIndexscan.c:910–922

---------------------------------------------------------------- * ExecInitIndexScan * * Initializes the index scan's state information, creates * scan keys, and opens the base and index relations. * * Note: index scans have 2 sets of state information because * we have to keep track of the base relation and the * index relation. * ---------------------------------------------

 * ----------------------------------------------------------------
 */
IndexScanState *
ExecInitIndexScan(IndexScan *node, EState *estate, int eflags)
{
	Relation	currentRelation;

	/*
	 * open the base relation and acquire appropriate lock on it.
	 */
	currentRelation = ExecOpenScanRelation(estate, node->scan.scanrelid, eflags);

	return ExecInitIndexScanForPartition(node, estate, eflags,
	                                     currentRelation, node->indexid);
}

IndexScanState *
ExecInitIndexScanForPartition(IndexScan *node, EState *estate, int eflags,