On Sat, Nov 7, 2015 at 2:32 AM, Tom Lane <t...@sss.pgh.pa.us> wrote: > What I'm wondering about is whether to back-patch this. It's possible > that people have written patterns like this and not realized that they > aren't doing quite what's expected. Getting a failure instead might not > be desirable in a minor release. On the other hand, wrong answers are > wrong answers.
I would say wrong answers are wrong answers. It's hard to believe there are many people doing this but if they are they're certainly expecting the look-ahead to actually test that it's looking at the same thing as the capturing parens. It might even be something security-critical like parsing an connection string or something like that. I can't see it's doing people any favours to let their code continue doing something unexpected to avoid new errors. -- greg -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers