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Re: Bug with plpgsql, temp tables and TOAST?

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Matthijs Bomhoff <matthijs(at)quarantainenet(dot)nl>
Cc: pgsql-bugs <pgsql-bugs(at)postgresql(dot)org>
Subject: Re: Bug with plpgsql, temp tables and TOAST?
Date: 2011-06-29 20:22:25
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Lists: pgsql-bugs
Excerpts from Matthijs Bomhoff's message of mié jun 29 15:20:49 -0400 2011:

> Possibly related: In some earlier attempts at reproducing this, I
> actually tried to use length() instead of md5(). It seemed that I
> could not get it to trigger with that. Just selecting * triggers it of
> course, but caused a bit too much clutter in my psql for the required
> long random strings, so I had to find a function that would actually
> need the value itself. Hence the md5().

Yeah, the length can be obtained from the toast header AFAIR, so you
don't need to do a full detoast of the value, which masks the problem.

Álvaro Herrera <alvherre(at)commandprompt(dot)com>
The PostgreSQL Company - Command Prompt, Inc.
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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