Plpgsql: Assign regular expression match to variable

From: "Leif B(dot) Kristensen" <leif(at)solumslekt(dot)org>
To: pgsql-sql(at)postgresql(dot)org
Subject: Plpgsql: Assign regular expression match to variable
Date: 2009-09-01 12:01:00
Message-ID: 200909011401.00231.leif@solumslekt.org
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In Plpgsql, I've got this problem of how to assign an integer extracted
from a regex to a variable. My approach so far feels kludgy:

-- extract ^#(\d+) from txt
IF txt SIMILAR TO E'#\\d+%' THEN
my_int := SUBSTR(SUBSTRING(txt, E'#\\d+'), 2,
LENGTH(SUBSTRING(txt, E'#\\d+')) -1)::INTEGER;
-- strip ^#\d+ from text
my_txt := REGEXP_REPLACE(txt, E'^#\\d+ ', '');
END IF;

What I'd like to do is something like this:

my_int := MATCH(txt, '^#(\d+)')::INTEGER;

which would assign the integer atom (\d+) to my_int.
--
Leif Biberg Kristensen | Registered Linux User #338009
Me And My Database: http://solumslekt.org/blog/

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