From: Jorg Janke <jorg.janke@compiere.org>
To: pgsql-sql@postgresql.org
Subject: Any way to handle exceptions in PL/pgSQL ?
Date: Sat, 1 Jun 2002 00:11:44 -0400
Message-ID: <6E2C6F49B3E09548A38EDCAD31C4182F04DDA0@MAIN.compiere.org> (raw)
Is there any way to handle failed queries in PL/pgSQL?
<< I am aware that the example can be re-worded in a single query; This
is a question more on how to do the 'procedural' part >>
Example:
1st query
if OK, return result
2ne query
if OK, return result
return error message
Is it correct, that if a function fails, it returns null ??
-- Function: message_get(varchar)
CREATE FUNCTION message_get(varchar) RETURNS varchar AS '
DECLARE
p_key ALIAS FOR $1;
v_RetValue Message.MsgText%TYPE;
BEGIN
SELECT MsgText INTO v_RetValue
FROM User_Message
WHERE Value = p_Value;
-- if ok ??
RETURN v_RetValue;
SELECT Text INTO v_RetValue
FROM Sys_Message
WHERE Value = p_Value;
-- if ok ??
RETURN v_RetValue;
RETURN 'nothing found';
END;
' LANGUAGE 'plpgsql';
Cheers,
Jorg Janke (203) 445-9503 http://www.compiere.org
Smart ERP & CRM Business Solution for Distribution and Service globally
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To: pgsql-sql@postgresql.org
Cc: jorg.janke@compiere.org
Subject: Re: Any way to handle exceptions in PL/pgSQL ?
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