Function ExecSeqScanEstimate

src/backend/executor/nodeSeqscan.c:310–320

---------------------------------------------------------------- * ExecSeqScanEstimate * * Compute the amount of space we'll need in the parallel * query DSM, and inform pcxt->estimator about our needs. * ---------------------------------------------------------------- */

 * ----------------------------------------------------------------
 */
void
ExecSeqScanEstimate(SeqScanState *node,
					ParallelContext *pcxt)
{
	EState	   *estate = node->ss.ps.state;

	node->pscan_len = table_parallelscan_estimate(node->ss.ss_currentRelation,
												  estate->es_snapshot);
	shm_toc_estimate_chunk(&pcxt->estimator, node->pscan_len);
	shm_toc_estimate_keys(&pcxt->estimator, 1);
}

/* ----------------------------------------------------------------
 *		ExecSeqScanInitializeDSM