Re: log bind parameter values on error

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andres Freund <andres(at)anarazel(dot)de>, Alexey Bashtanov <bashtanov(at)imap(dot)cc>, Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: log bind parameter values on error
Date: 2019-12-06 21:47:26
Message-ID: 20191206214726.GA4669@alvherre.pgsql
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On 2019-Dec-06, Pavel Stehule wrote:

> pá 6. 12. 2019 v 18:57 odesílatel Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
> napsal:

> > (It seems a bit weird that if I assign NULL to :two pgbench stores the
> > empty string, instead of the NULL that I get as in the above which is
> > what happens when the variable is not defined at all. That's probably a
> > bug in \gset ...)
>
> psql session variables cannot to hold NULL

I also just learned that the :foo expansion in pgbench behaves crazily
when in normal query mode, particularly re. quotes in variables.

--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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