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From: Kumar <sgnerd@yahoo.com.sg>
To: psql <pgsql-sql@postgresql.org>
Subject: Using UNION inside a cursor
Date: Thu, 30 Oct 2003 14:23:48 +0530
Message-ID: <007c01c39ec4$5af992f0$7502a8c0@hdsc.com> (raw)

Dear Friends,

I am working on Postgresql 7.3.4 on RH Linux Server 7.3. 

I have problem in executing the following procedure

CREATE OR REPLACE FUNCTION list_history()
  RETURNS refcursor AS
'DECLARE
 ref   REFCURSOR;
BEGIN
 OPEN ref FOR
 (SELECT  * FROM history  WHERE obs_type = \'AA\' )
 UNION 
 (SELECT  * FROM  history  WHERE   obs_type = \'TA\');

 RETURN ref;
END;'
  LANGUAGE 'plpgsql' VOLATILE;

While executing this I got the following error

WARNING:  plpgsql: ERROR during compile of list_history near line 5
ERROR:  syntax error at "("

While I execute the following code it is working fine and fetches values.
 (SELECT  * FROM history  WHERE obs_type = \'AA\' )
 UNION 
 (SELECT  * FROM  history  WHERE   obs_type = \'TA\');

Where I am wrong. Please shed some light,

Regards
Kumar

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