On Fri, December 13, 2013 18:40, Tom Lane wrote:
> spmpro@pochta.ru writes:
>> May be, regex construction (?<=\pattern\) is not support?
>
> It is not. What we support is documented at
> http://www.postgresql.org/docs/9.2/static/functions-matching.html#FUNCTIONS-POSIX-REGEXP
>
> I have no idea what "(?<=" is supposed to mean --- it's not a standard
FWIW, perl has these; see http://perldoc.perl.org/perlre.html (search for "Look-Around Assertions" ):
(?<=pattern) A zero-width positive look-behind assertion
(?<!pattern) A zero-width negative look-behind assertion.
It would certainly be nice if these would implemented in postgres...
