Re: Need to improve performance

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Vassili A Akimov <vassili(at)erols(dot)com>
Cc: Andrew Snow <als(at)fl(dot)net(dot)au>, "Pgsql-General(at)Postgresql(dot) Org" <pgsql-general(at)postgresql(dot)org>, mitch(at)venux(dot)net
Subject: Re: Need to improve performance
Date: 2000-06-23 18:06:50
Message-ID: 200006231806.OAA19976@candle.pha.pa.us
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>
> Thank you gentelmen! It seems that regexp was the reason! I enabled
> likeplanning and it i=didn't improve the performance until I replaced '~*' with
> 'LIKE'. Thank you again!

The issue is that ~ and LIKE have similar performance. ~* is
case-insensitive, and can not used indexes.

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