| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "Christopher Condit" <condit(at)sdsc(dot)edu> |
| Cc: | "Craig Ringer" <craig(at)postnewspapers(dot)com(dot)au>, pgsql-general(at)postgresql(dot)org |
| Subject: | Re: initdb in 8.3 |
| Date: | 2008-04-24 14:02:16 |
| Message-ID: | 27854.1209045736@sss.pgh.pa.us |
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| Lists: | pgsql-general |
"Christopher Condit" <condit(at)sdsc(dot)edu> writes:
> Although, once you've built the index with varchar_pattern_ops index,
> the following two (essentially equivalent) queries will run at vastly
> different speeds:
> select * from A where A.value like 'Nacho';
> select * from A where A.value = 'Nacho';
> Seems that the optimizer should catch this...
Yeah, it's on the to-do list ...
http://archives.postgresql.org/pgsql-hackers/2008-02/msg01003.php
regards, tom lane
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