Oleg Bartunov <oleg(at)sai(dot)msu(dot)su> writes:
> seems for regexp which works in 7.3 is failing in 7.4.
> Is't possible to configure pgsql to be compatible with 7.3 regexp ?
SET regex_flavor TO extended;
> www=# select 'problem' ~ '^\\p';
> ERROR: invalid regular expression: invalid escape \ sequence
I think, though, that this is telling you about a bug in your
application. You do realize that under extended regex rules there's
no difference between that pattern and '^p' ? Is that *really* what
you want?
regards, tom lane