From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Jan Wieck <JanWieck(at)yahoo(dot)com>, Peter Eisentraut <peter_e(at)gmx(dot)net> |
Cc: | PostgreSQL HACKERS <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Dollar in identifiers |
Date: | 2003-01-09 17:09:46 |
Message-ID: | 5507.1042132186@sss.pgh.pa.us |
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Thread: | |
Lists: | pgsql-hackers |
Quite awhile back, we had a discussion about removing "$" from the set
of allowed characters in operator names, and instead allowing it as a
non-first character in identifiers. (It'd have to be non-first to avoid
ambiguity with parameter symbols "$nnn".) See, eg,
http://archives.postgresql.org/pgsql-hackers/2001-08/msg00629.php
That discussion petered out without any definite consensus being
reached, but I think it's time to reconsider the idea. We're getting
flak about "x<$n" being parsed as "x <$ n" rather than "x < $n" (see
current thread in pgsql-sql). While this has always been a hazard for
SQL and plpgsql function writers, it is now also a hazard in direct
SQL, if you use PREPAREd queries. So I think the importance of avoiding
such problems has moved up a notch as of 7.3.
So, I'd like to put that proposal back on the table. Comments anyone?
regards, tom lane
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