From: Tom Lane <tgl@sss.pgh.pa.us>
To: Khangelani Gama <Khangelani.Gama@ucs-software.co.za>
Cc: pgsql-admin@postgresql.org <pgsql-admin@postgresql.org>
Subject: Re: How can I find a broken row in a table
Date: Fri, 16 Apr 2010 10:23:48 -0400
Message-ID: <8600.1271427828@sss.pgh.pa.us> (raw)
In-Reply-To: <D78A8169F9436B4DB978300336168F3B3359AFE0FE@SWBREXCH00.ucs-software.net>
References: <D78A8169F9436B4DB978300336168F3B3359AFE0FE@SWBREXCH00.ucs-software.net>
Khangelani Gama <Khangelani.Gama@ucs-software.co.za> writes:
> Please help me, I am using PostgreSQL 7.3.4 running on Redhat5
> there is a table that has a broken row, but now I don't know which one
is broken. the table has about 20974 pages. is there a command to find
this?
You have to use divide-and-conquer. Try
select ctid from table limit N;
and vary N until you find the largest value that *doesn't* produce an
error. The block number in the last ctid from that query is the block
before the bad one, or possibly a small number of blocks before the bad
one if there are some totally-empty blocks.
regards, tom lane
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To: pgsql-admin@postgresql.org
Cc: tgl@sss.pgh.pa.us, Khangelani.Gama@ucs-software.co.za
Subject: Re: How can I find a broken row in a table
In-Reply-To: <8600.1271427828@sss.pgh.pa.us>
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