Re: LIKE pattern
| От | SoDupuDupu |
|---|---|
| Тема | Re: LIKE pattern |
| Дата | |
| Msg-id | 1462830066860-5902701.post@n5.nabble.com обсуждение исходный текст |
| Ответ на | LIKE pattern (Владимир <vovka@krevedko.su>) |
| Ответы |
Re: LIKE pattern
|
| Список | pgsql-performance |
Владимир-3 wrote > It seems my quite complex query runs 10 times faster on "some_column > LIKE '%test_1' " vs "some_column LIKE 'test_1' " > So I just add "%" to the pattern... Keep in mind then LIKE '%test_1' and LIKE 'test_1' are not equivalent, using the % as a prefix to the argument means that the scan only has to confirm that the value ends in 'test_1' where forgoing the % entirely means that you are essentially saying some_column='test_1'. -- View this message in context: http://postgresql.nabble.com/LIKE-pattern-tp5902225p5902701.html Sent from the PostgreSQL - performance mailing list archive at Nabble.com.
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