On Thu, 1 Feb 2007, David Fetter wrote:
> Yes, although it might have the same name, as in regex_match(pattern
> TEXT, string TEXT, return_pre_and_post BOOL).
>
> The data structure could be something like
>
> TYPE matches (
> prematch TEXT,
> match TEXT[],
> postmatch TEXT
> )
I just coded up for this:
CREATE FUNCTION regexp_matches(IN str text, IN pattern text) RETURNS
text[] AS 'MODULE_PATHNAME', 'regexp_matches' LANGUAGE C IMMUTABLE STRICT;
CREATE FUNCTION regexp_matches( IN str text, IN pattern text, IN return_pre_and_post bool, OUT prematch
text,OUT fullmatch text, OUT matches text[], OUT
postmatch text) RETURNS record AS 'MODULE_PATHNAME', 'regexp_matches' LANGUAGE C IMMUTABLE STRICT;
Which works like this:
jeremyd=# \pset null '\\N'
Null display is "\N".
jeremyd=# select * from regexp_matches('foobarbequebaz',
$re$(bar)(beque)$re$);regexp_matches
----------------{bar,beque}
(1 row)
jeremyd=# select * from regexp_matches('foobarbequebaz',
$re$(bar)(beque)$re$, false);prematch | fullmatch | matches | postmatch
----------+-----------+-------------+-----------\N | \N | {bar,beque} | \N
(1 row)
jeremyd=# select * from regexp_matches('foobarbequebaz',
$re$(bar)(beque)$re$, true);prematch | fullmatch | matches | postmatch
----------+-----------+-------------+-----------foo | barbeque | {bar,beque} | baz
(1 row)
And then you also have this behavior in the matches array:
jeremyd=# select * from regexp_matches('foobarbequebaz',
$re$(bar)(.*)(beque)$re$);regexp_matches
----------------{bar,"",beque}
(1 row)
jeremyd=# select * from regexp_matches('foobarbequebaz',
$re$(bar)(.+)(beque)$re$);regexp_matches
----------------\N
(1 row)
jeremyd=# select * from regexp_matches('foobarbequebaz',
$re$(bar)(.+)?(beque)$re$); regexp_matches
------------------{bar,NULL,beque}
(1 row)
Reasonable?
--
A.A.A.A.A.:An organization for drunks who drive
