From: Pavel Stehule <pavel.stehule@gmail.com>
To: bilal ghayyad <bilmar_gh@yahoo.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: PostgreSQL Function: how to know the number of the returned results of the Query
Date: Tue, 1 Sep 2009 07:35:53 +0200
Message-ID: <162867790908312235t232a86d8sbeded1c02b62ae92@mail.gmail.com> (raw)
In-Reply-To: <675038.56213.qm@web53902.mail.re2.yahoo.com>
References: <675038.56213.qm@web53902.mail.re2.yahoo.com>
Hello
look on PERFORM and GET DIAGNOSTICS statements
http://www.postgresql.org/docs/8.2/static/plpgsql-statements.html#PLPGSQL-STATEMENTS-SQL-NORESULThttp://www.postgresql.org/docs/8.2/static/plpgsql-statements.html#PLPGSQL-STATEMENTS-DIAGNOSTICS
regards
Pavel Stehule
2009/9/1 bilal ghayyad <bilmar_gh@yahoo.com>:
> 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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To: pgsql-sql@postgresql.org
Cc: pavel.stehule@gmail.com, bilmar_gh@yahoo.com
Subject: Re: PostgreSQL Function: how to know the number of the returned results of the Query
In-Reply-To: <162867790908312235t232a86d8sbeded1c02b62ae92@mail.gmail.com>
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