Re: [PATCHES] libpq type system 0.9a

From: Jeff Davis <pgsql(at)j-davis(dot)com>
To: Bruce Momjian <bruce(at)momjian(dot)us>
Cc: Andrew Chernow <ac(at)esilo(dot)com>, Joe Conway <mail(at)joeconway(dot)com>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Merlin Moncure <mmoncure(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org>
Subject: Re: [PATCHES] libpq type system 0.9a
Date: 2008-04-09 01:28:03
Message-ID: 1207704483.4478.97.camel@dogma.ljc.laika.com
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On Tue, 2008-04-08 at 12:59 -0400, Bruce Momjian wrote:
> If you need something exposed by
> libpq that is not there already, please let us know.

The things that I found missing in libpq so far are:

* The ability to choose some result columns to be binary-formatted and
others to be text-formatted. I haven't thought of a reasonable API for
this yet, particularly since we already have so many ways of executing a
statement.

* an "escapeIdent" function.

* PQescapeBytea escapes for both inclusion in a SQL statement and also
the escaping for the input function for bytea. This means that, if you
are passing a binary value as a text-format parameter, using
PQescapeBytea is incorrect, and you need to write your own octal escape
routine. This is obviously a minor complaint, and may not even be worth
polluting the namespace. I only mention it because it seems like an easy
mistake to make.

I don't have a proposal ready for any of these yet, but this is what
I've found to be awkward or limiting during my work on ruby-pg. If I
have a more complete proposal I'll start a new thread.

Regards,
Jeff Davis

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