explain analyze select * from objects_hier where tg && array[0] and id <10000;
Bitmap Heap Scan on objects_hier (cost=4.79..8.80 rows=1 width=337) (actual time=0.110..0.110 rows=0 loops=1)
Recheck Cond: ((tg && '{0}'::integer[]) AND (id < 10000))
-> BitmapAnd (cost=4.79..4.79 rows=1 width=0) (actual time=0.106..0.106 rows=0 loops=1)
-> Bitmap Index Scan on gistbla2 (cost=0.00..2.10 rows=30 width=0) (actual time=0.042..0.042 rows=0 loops=1)
Index Cond: (tg && '{0}'::integer[])
-> Bitmap Index Scan on ohid (cost=0.00..2.44 rows=1240 width=0) (actual time=0.058..0.058 rows=1255 loops=1)
Index Cond: (id < 10000)
I see, Bitmap is going to AND my indexes.. It read one with less number of rows estimated the first (right)..
It found 0 records at gistbla2 index…
Then why is it reading ohid ?
Maybe a quickfix is possible for cases when 0 records is found to stop reading other AND elements..
