Tom Lane wrote:

[EMAIL PROTECTED] (David Fetter) writes:


While PL/Perl is great, it's not available everywhere, and I'd like to
be able to grab atoms from a regex match in, say, a SELECT. Is there
some way to get access to them?



There's a three-parameter variant of substring() that allows extraction of a portion of a regex match --- unfortunately it uses SQL99's brain-dead notion of regex, which will not satisfy any Perl weenie :-(

I think it'd be worth our while to define some comparable functionality
that depends only on the POSIX regex engine ...



substitute should be relatively straightforward, I guess; split and match maybe less so - what do you return? An array? Or you could require an explicit subscript to get a particular return value as in split_part(), which would be potentially inefficient if you want more than one (although I guess results could be cached).


cheers

andrew


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