From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Andrew Dunstan <andrew(at)dunslane(dot)net> |
Cc: | andrew5(at)ece(dot)cmu(dot)edu, PostgreSQL-patches <pgsql-patches(at)postgresql(dot)org> |
Subject: | Re: [BUGS] BUG #2171: Differences compiling plpgsql in ecpg |
Date: | 2006-02-03 03:55:23 |
Message-ID: | 200602030355.k133tNw00862@candle.pha.pa.us |
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Lists: | pgsql-bugs pgsql-interfaces pgsql-patches |
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(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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