Re: BUG #10889: Cannot add 2 floats from regular expression

Tom Lane-2 wrote
> David G Johnston <

> david.g.johnston@

> > writes:
>> Suggest wrapping it in a function - or making a "regexp_matches_single"
>> function that behaves similarly but returns a single text[] instead of a
>> SETOF text[]
>
> I wonder if we should have such a thing built-in. This isn't the first
> complaint we've heard about the SETOF API being awkward to use, and it's
> only needed if you specify the 'g' flag. Perhaps we could have a variant
> that forbids 'g' and returns a non-set (either the single match, or NULL).
>
> regards, tom lane

+1

Given that regexp_matches is in core having this most useful API makes
perfect sense to me. Parsing out components from data is an extremely
common use-case for regexp - one that I personally encounter much more often
than needing global matching behavior.

I agree that the presence of the 'g' flag when calling regexp_matches_single
(_once?) should emit an error.

David J.

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