Function GetBitmapIndexAuxOids

src/backend/access/bitmap/bitmap.c:1098–1120

* GetBitmapIndexAuxOids - Given an open index, fetch and return the oids for * the bitmap subobjects (pg_bm_xxxx + pg_bm_xxxx_index). * * Note: Currently this information is not stored directly in the catalog, but * is hidden away inside the metadata page of the index. Future versions should * move this information into the catalog. */

 * move this information into the catalog.
 */
void 
GetBitmapIndexAuxOids(Relation index, Oid *heapId, Oid *indexId)
{
	Buffer     metabuf;
	BMMetaPage metapage;
	

	/* Only Bitmap Indexes have bitmap related sub-objects */
	if (!RelationIsBitmapIndex(index))
	{
		*heapId = InvalidOid;
		*indexId = InvalidOid;
		return;
	}
	
	metabuf = _bitmap_getbuf(index, BM_METAPAGE, BM_READ);
	metapage = _bitmap_get_metapage_data(index, metabuf);

	*heapId  = metapage->bm_lov_heapId;
	*indexId = metapage->bm_lov_indexId;

	_bitmap_relbuf(metabuf);
}

bytea *
bmoptions(Datum reloptions, bool validate)