The following bug has been logged online:
Bug reference: 3701
Logged by: girla
Email address: girla@online.ua
PostgreSQL version: 8.3beta1
Operating system: Windows XP Proffesional SP2
Description: Don't work intarray GIN indexes
Details:
8.3beta1 never used intarray GIN indexes.
The same test case:
EXPLAIN
SELECT *
FROM intarr
WHERE (arr && ARRAY[132,20,78,45,457]);
on 8.2:
--------------------
"Bitmap Heap Scan on intarr (cost=4.33..37.45 rows=10 width=64)"
" Recheck Cond: (arr && '{132,20,78,45,457}'::integer[])"
" -> Bitmap Index Scan on i_arr_gin (cost=0.00..4.33 rows=10 width=0)"
" Index Cond: (arr && '{132,20,78,45,457}'::integer[])"
and on 8.3beta1:
---------------------
"Seq Scan on intarr (cost=0.00..238.00 rows=10 width=58)"
" Filter: (arr && '{132,20,78,45,457}'::integer[])"