I was looking for a way to cast hex numbers (stored in a varchar column)
to int. I found many people asking the same thing, but no answers.
It seems that this is supported by the following syntax
select x'1f'::int;
Since this doesn't work with variable values, I wrote this following
function. Perhaps it will help anyone wanting to do the same thing.
CREATE OR REPLACE FUNCTION hex_to_int(varchar) RETURNS integer AS '
DECLARE
h alias for $1;
exec varchar;
curs refcursor;
res int;
BEGIN
exec := ''SELECT x'''''' || h || ''''''::int'';
OPEN curs FOR EXECUTE exec;
FETCH curs INTO res;
CLOSE curs;
return res;
END;'
LANGUAGE 'plpgsql'
IMMUTABLE
STRICT;
--
Richard van den Berg, CISSP
Trust Factory B.V. | http://www.trust-factory.com/
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