Function ExecInitIndexOnlyScan

src/backend/executor/nodeIndexonlyscan.c:491–503

---------------------------------------------------------------- * ExecInitIndexOnlyScan * * 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. * -----------------------------------------

 * ----------------------------------------------------------------
 */
IndexOnlyScanState *
ExecInitIndexOnlyScan(IndexOnlyScan *node, EState *estate, int eflags)
{
	Relation	currentRelation;

	/*
	 * open the scan relation
	 */
	currentRelation = ExecOpenScanRelation(estate, node->scan.scanrelid, eflags);

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

IndexOnlyScanState *
ExecInitIndexOnlyScanForPartition(IndexOnlyScan *node, EState *estate, int eflags,