Re: [BUGS] BUG #2171: Differences compiling plpgsql in ecpg

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.

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