Re: COPY WITH CSV FORCE QUOTE *

From: Josh Berkus <josh(at)agliodbs(dot)com>
To: Andrew Dunstan <andrew(at)dunslane(dot)net>
Cc: Itagaki Takahiro <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp>, Jaime Casanova <jcasanov(at)systemguards(dot)com(dot)ec>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: COPY WITH CSV FORCE QUOTE *
Date: 2009-07-16 20:13:22
Message-ID: 4A5F89E2.50507@agliodbs.com
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Andrew,

> AFAICT on a brief look at the patch, it doesn't affect the quoting of
> nulls on export, it just allows * as an alias for all columns for FORCE
> QUOTE (as well as FORCE NOT NULL). But FORCE QUOTE has never forced
> quoting of null values, only non-null values. We have never quoted null
> values, and I'm fairly resistant to any suggestion that we should.

See? That's what happens when I can't build the docs. ;-) (and
there's no previous discussion of the feature).

>
> As for importing data from programs that produce all values in quotes
> including null/missing values (your pro case above), arguably what we
> need is another flag that would turn an empty string into a null.

ooooh, TODO, please? There's a lot of this out there, and I've had to
build sed into a lot of import routines.

--
Josh Berkus
PostgreSQL Experts Inc.
www.pgexperts.com

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