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Re: User Define Functions

From: Gnanavel S <s(dot)gnanavel(at)gmail(dot)com>
To: Lathika Wijerathne <lathika(at)rezgateway(dot)com>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: User Define Functions
Date: 2005-07-27 07:08:49
Message-ID: eec3b03c0507270008513803c2@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-admin
use 
set search_path = yourschemaname
to set the schema before calling the function

On 7/27/05, Lathika Wijerathne <lathika(at)rezgateway(dot)com> wrote:
> 
>  Hi,
> 
>  I have created the database with 3 schemas. 
> 
> Example : Schema names : Newyorlk, Atlanta,California
> 
>  Each schema has a similar tables. But there can be schema specific tables 
> too.
> 
>  I want to create a user define functions to retrieve information.
> 
>  ----------------------------------------------------------------------
> 
> CREATE OR REPLACE FUNCTION Newyorlk.get_customer_name (custid integer, 
> invoice integer)
> 
> RETURNS varchar AS
> 
> $$
> 
>  DECLARE
> 
> m_display varchar (100);
> 
> m_status varchar(10);
> 
> BEGIN
> 
>  SELECT cname INTO m_display from Newyorlk.*CUSTOMER*
> 
> WHERE id = custid;
> 
>  SELECT status INTO m_status from Newyorlk.*CUSTOMER_INVOICE*
> 
> WHERE id = invoice;
> 
>  m_display := m_display||'-'|| m_status ;
> 
>  RETURN m_display;
> 
> END;
> 
> $$
> 
> LANGUAGE 'plpgsql' VOLATILE;
> 
> --------------------------------------------------------------------
> 
>  In the above function if I change Newyorlk.*CUSTOMER to CUSTOMER . *It 
> gives a runtime error saying table not available.
> 
> I think when I remove the schema name, posgresSql checks the table in the 
> public schema.
> 
>  But in Oracle, when we give the schema name with the function name, it 
> assumes all the objects within the functions are referring to that schema.
> 
> Do you know any other way to do a user define function, without hard 
> cording schema name each time when referring to a table.
> 
>  Thanks in Advance
> 
> Lathika
> 
>   


-- 
with regards,
S.Gnanavel
Satyam Computer Services Ltd.

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