Function RelationSupportPrefetch

src/backend/executor/nodeBitmapHeapscan.c:80–84

* Other non-heap table access method may use bitmap scan, * the prefetch will not work for them if they have * non-standard page-based storage. */

 * non-standard page-based storage.
 */
static inline bool
RelationSupportPrefetch(Relation rel)
{
	return RelationIsHeap(rel);
}

/*
 * Free the state relevant to bitmaps