cost variable into function

From: "Alain Roger" <raf(dot)news(at)gmail(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: cost variable into function
Date: 2008-10-19 14:03:47
Message-ID: 75645bbb0810190703o73e76ce6na376ec6f3d4e9128@mail.gmail.com
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Hi,

i created a stored procedure (function) under postgreSQL and when i checked
deeper into my DB, this is what i get:
....
END;
$BODY$
LANGUAGE 'plpgsql' VOLATILE
COST 100;
ALTER FUNCTION myschema.get_count_languages(character varying) OWNER TO
myuser;

to what corresponds the parameter COST 100 ?
it is the first time i see that :-(
thx.
--
Alain
------------------------------------
Windows XP SP3
PostgreSQL 8.2.4 / MS SQL server 2005
Apache 2.2.4
PHP 5.2.4
C# 2005-2008

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