From: Tom Lane <tgl@sss.pgh.pa.us>
To: Віталій Тимчишин <tivv00@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Delete performance again
Date: Thu, 02 Oct 2008 08:14:20 -0400
Message-ID: <23315.1222949660@sss.pgh.pa.us> (raw)
In-Reply-To: <331e40660810020242u2f0f5de2qe146312e448a7df4@mail.gmail.com>
References: <331e40660810020242u2f0f5de2qe146312e448a7df4@mail.gmail.com>
"=?ISO-8859-5?B?svbi0Nv22SDC2Nzn2OjY3Q==?=" <tivv00@gmail.com> writes:
> delete from company where id not in (select company_id from company_descr);
> I've tried to analyze command, but unlike to other RDBM I've used it did not
> include cascade deletes/checks into query plan. That is first problem.
> It was SLOW.
Usually the reason for that is having forgotten to make an index on the
referencing column(s) ?
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, tivv00@gmail.com
Subject: Re: Delete performance again
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