Tom Lane wrote: > Craig Ringer <craig@xxxxxxxxxxxxxxxxxxxxx> writes: >> The following query should return 2 records, but returns zero instead: > >> test=> select x, regexp_matches(x::text, 'm') >> test-> FROM generate_series(1,2) AS x; >> x | regexp_matches >> ---+---------------- >> (0 rows) > > No, that's correct. The SRF returns an empty set, so there are no > output records. The behavior you seem to be imagining would make it > impossible to distinguish empty set from a single row containing NULL. Aah, that makes sense. For some reason I'd been thinking of regexp_matches as returning a single array, rather than returning a set of scalar values. RTFM (better) I guess. Sorry. Thanks for taking a look, it's appreciated. -- Craig Ringer -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
