From: Talha Khan <talha.amjad@gmail.com>
To: Milen Kulev <makulev@gmx.net>
Cc: pgsql-performance@postgresql.org
Subject: Re: Pipelined functions in Postgres
Date: Tue, 19 Sep 2006 14:07:58 -0700
Message-ID: <f80885fc0609191407p496ac28dy5825698e7b5065d0@mail.gmail.com> (raw)
In-Reply-To: <005701c6dc2c$49011fc0$0a00a8c0@trivadis.com>
References: <005701c6dc2c$49011fc0$0a00a8c0@trivadis.com>
Hi Milen,
Pipelined function is a code that acts like a database table.
Inorder to use this functionality in postgres you would need to write the
function like this
CREATE OR REPLACE FUNCTION get_test_data (numeric)
RETURNS SETOF RECORD AS
$$
DECLARE
temp_rec RECORD;
BEGIN
FOR temp_rec IN (SELECT ename FROM emp WHERE sal > $1)
LOOP
RETURN NEXT temp_rec;
END LOOP;
RETURN;
END;
$$ LANGUAGE plpgsql;
now inorder to call this function you would write the code as follows
SELECT * FROM get_test_data(1000) AS t1 (emp_name VARCHAR);
Regards
Talha Amjad
On 9/19/06, Milen Kulev <makulev@gmx.net> wrote:
>
> Hello Lister,
> I am curios whether I can emulate the Oracle pipelined functions
> functionality in PG too (using RETURN NEXT ). For more
> information and examples about Oracle pipelined functions see:
>
> http://asktom.oracle.com/pls/ask/f?p=4950:8:8127757633768425921::NO::F4950_P8_DISPLAYID,F4950_P8_CRI...
>
> I have used pipeline functions in DWH enviromnent with success and would
> like
> To use similar concept in PG too.
>
> Any help, examples , links and shared experiences would be greately
> appreciated.
>
> Best Regards.
> Milen
>
>
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To: pgsql-performance@postgresql.org
Cc: talha.amjad@gmail.com, makulev@gmx.net
Subject: Re: Pipelined functions in Postgres
In-Reply-To: <f80885fc0609191407p496ac28dy5825698e7b5065d0@mail.gmail.com>
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