trm4.sql

EXPLAIN ANALYZE WITH Prefiltered AS (SELECT * FROM items WHERE name ILIKE '%кол%' AND name ILIKE '%пер%') SELECT * FROM Prefiltered WHERE name ILIKE '%08%';
                                                          QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------------
 CTE Scan on prefiltered  (cost=2814.22..2835.77 rows=192 width=2965) (actual time=1.550..11.602 rows=68 loops=1)
   Filter: ((name)::text ~~* '%08%'::text)
   Rows Removed by Filter: 972
   CTE prefiltered
     ->  Bitmap Heap Scan on items  (cost=37.82..2814.22 rows=958 width=800) (actual time=1.103..8.147 rows=1040 loops=1)
           Recheck Cond: (((name)::text ~~* '%кол%'::text) AND ((name)::text ~~* '%пер%'::text))
           Heap Blocks: exact=929
           ->  Bitmap Index Scan on trgm_idx  (cost=0.00..37.58 rows=958 width=0) (actual time=0.954..0.954 rows=1040 loops=1)
                 Index Cond: (((name)::text ~~* '%кол%'::text) AND ((name)::text ~~* '%пер%'::text))
 Planning time: 1.700 ms
 Execution time: 11.727 ms
(11 rows)