From: Bruce Momjian <pgman@candle.pha.pa.us>
To: Andrew Dunstan <andrew@dunslane.net>
Cc: andrew5@ece.cmu.edu, PostgreSQL-patches <pgsql-patches@postgresql.org>
Subject: Re: [BUGS] BUG #2171: Differences compiling plpgsql in ecpg
Date: Thu, 2 Feb 2006 22:55:23 -0500 (EST)
Message-ID: <200602030355.k133tNw00862@candle.pha.pa.us> (raw)
In-Reply-To: <1138905401.5342.15.camel@swithin>
Andrew Dunstan wrote:
> On Wed, 2006-02-01 at 23:48 -0500, Bruce Momjian wrote:
> > I have researched your report, and you are right, there are two ecpg
> > bugs here. First, dollar quoting uses single-quotes internally to do
> > the quoting, but it does not double any single-quotes in the
> > dollar-quoted string.
> >
>
> As a matter of curiosity, why does ecpg handle dollar quoting like that?
> psql, for example, happily just passes a dollar quoted string through to
> the backend, without any need to convert it to a conventionally quoted
> string.
ecpg actually parses the statements so it can do things like make
variable substitutions. The $$ and '' strings are actually passed to
preproc.y as SCONST. parser/scan.l does the same thing, though it
doesn't need to single-quote it and pass it up to eventually be output
in C.
--
Bruce Momjian | http://candle.pha.pa.us
pgman@candle.pha.pa.us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
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To: pgsql-interfaces@postgresql.org
Cc: pgman@candle.pha.pa.us, andrew@dunslane.net, pgsql-patches@postgresql.org
Subject: Re: [BUGS] BUG #2171: Differences compiling plpgsql in ecpg
In-Reply-To: <200602030355.k133tNw00862@candle.pha.pa.us>
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