Re: subquery performance and EXISTS

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
Cc: PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org>
Subject: Re: subquery performance and EXISTS
Date: 1999-12-29 16:07:26
Message-ID: 4091.946483646@sss.pgh.pa.us
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> Tom, does it still look easy to change, and if so, can you change it to
> hash?

We could probably do it, but there is the little problem that hash joins
only work for a very limited set of data types and operators. This
wouldn't be a complete solution on its own.

regards, tom lane

In response to

Responses

Browse pgsql-hackers by date

  From Date Subject
Next Message svn 1999-12-29 18:14:55 revoke/grant rights issue
Previous Message Tom Lane 1999-12-29 16:01:36 Re: [HACKERS] Index corruption