Function ExecBitmapHeapEstimate

src/backend/executor/nodeBitmapHeapscan.c:949–961

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

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

	node->pscan_len = add_size(offsetof(ParallelBitmapHeapState,
										phs_snapshot_data),
							   EstimateSnapshotSpace(estate->es_snapshot));

	shm_toc_estimate_chunk(&pcxt->estimator, node->pscan_len);
	shm_toc_estimate_keys(&pcxt->estimator, 1);
}

/* ----------------------------------------------------------------
 *		ExecBitmapHeapInitializeDSM