postgresql/doc
Tom Lane cf9b0fea5f Implement regexp_match(), a simplified alternative to regexp_matches().
regexp_match() is like regexp_matches(), but it disallows the 'g' flag
and in consequence does not need to return a set.  Instead, it returns
a simple text array value, or NULL if there's no match.  Previously people
usually got that behavior with a sub-select, but this way is considerably
more efficient.

Documentation adjusted so that regexp_match() is presented first and then
regexp_matches() is introduced as a more complicated version.  This is
a bit historically revisionist but seems pedagogically better.

Still TODO: extend contrib/citext to support this function.

Emre Hasegeli, reviewed by David Johnston

Discussion: <CAE2gYzy42sna2ME_e3y1KLQ-4UBrB-eVF0SWn8QG39sQSeVhEw@mail.gmail.com>
2016-08-17 18:33:01 -04:00
..
src Implement regexp_match(), a simplified alternative to regexp_matches(). 2016-08-17 18:33:01 -04:00
bug.template Stamp HEAD as 10devel. 2016-08-15 13:49:49 -04:00
KNOWN_BUGS
Makefile
MISSING_FEATURES
TODO