On Tue, Feb 9, 2010 at 10:31 PM, Richard Huxton <dev@archonet.com> wrote:
On 09/02/10 09:51, AI Rumman wrote:
I am using Postgresql 8.1.
I have to reverse a string like 'abc' to 'cba'.
Is there any function to do this?
Nothing built-in, but you can write your own easily enough in plpgsql - google a bit for examples.
From an old posting:
CREATE FUNCTION reverse(text) RETURNS text AS $_$
DECLARE
original alias for $1; reverse_str text; i int4;
BEGIN reverse_str := ''; FOR i IN REVERSE LENGTH(original)..1 LOOP reverse_str := reverse_str || substr(original,i,1); END LOOP;
RETURN reverse_str;
END;$_$ LANGUAGE plpgsql IMMUTABLE;
