From: bilal ghayyad <bilmar_gh@yahoo.com>
To: pgsql-sql@postgresql.org
Subject: PostgreSQL Function: how to know the number of the returned results of the Query
Date: Mon, 31 Aug 2009 17:53:23 -0700 (PDT)
Message-ID: <675038.56213.qm@web53902.mail.re2.yahoo.com> (raw)
Hi List;
I am building a function in the SQL (PostgreSQL), so I will be able to call this function using a SELECT query. Inside the body of this function, I was need to do the following but not able to know how:
I have a SELECT statement (inside the function script itself), and I need to know the number of the returned rows of that select query, if it is one row or 2 or 3 , ... How? In which paramter I will be able to check this?
For example, I have the following function:
CREATE OR REPLACE FUNCTION get_credit_time(text, text)
RETURNS integer AS
$BODY$
DECLARE
BEGIN
rate numberic(9,4);
SELECT rate from voiptariff where id= 9;
IF num_rows ==1 THEN -- As example, but I am asking how to do it?
.............
ELSE
.............
END IF
END
$BODY$
LANGUAGE 'sql' IMMUTABLE
COST 100;
ALTER FUNCTION get_bool(text) OWNER TO gkradius;
In this function, I need to check the number of returned rows of the statement: SELECT rate from voiptariff where id= 9; because based on it I am going to build if statment, How?
Any help?
Regards
Bilal
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Cc: bilmar_gh@yahoo.com
Subject: Re: PostgreSQL Function: how to know the number of the returned results of the Query
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