Reply-To: <dpandey@secf.com>
From: "Dinesh Pandey" <dpandey@secf.com>
To: "'Richard Huxton'" <dev@archonet.com>
Cc: "'PostgreSQL'" <pgsql-sql@postgresql.org>
Subject: Re: Prepared query ?
Date: Thu, 14 Apr 2005 20:33:45 +0530
Organization: Second Foundation India P Ltd.
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In-Reply-To: <425E852D.2020808@archonet.com>
Message-Id: <20050414150625.0A51653603@svr1.postgresql.org>

Yes you got my problem correctly. I want to change tablename and values at
run time.

Is there any other way instead using "||" (append) ? like prepared
statement.

PREPARE fooplan (int, text, bool, numeric) AS
    INSERT INTO foo VALUES($1, $2, $3, $4);
EXECUTE fooplan(1, 'Hunter Valley', 't', 200.00);


Thanks
Dinesh Pandey

-----Original Message-----
From: Richard Huxton [mailto:dev@archonet.com] 
Sent: Thursday, April 14, 2005 8:29 PM
To: dpandey@secf.com
Cc: 'PostgreSQL'
Subject: Re: [SQL] Prepared query ?

Dinesh Pandey wrote:
> How can I
> 
>    1. Write a prepared query and
>    2. Set values at run time and
>    3. Execute that query for different values.

> LOOP
>      ...
>      ...
> sql := INSERT INTO MYTABLE VALUES(?, ?);

> --EXECUTE (sql);

You don't say what language you want to use, but assuming it's plpgsql, 
then for the simple case you can just do:

LOOP
   INSERT INTO mytable VALUES (var1, var2);
END LOOP

Now, let's say you wanted to change mytable as well as the values, you'd use
   sql := ''INSERT INTO '' || quote_ident(my_table_variable) || '' 
VALUES  ...etc'';
   EXECUTE sql;

Does that help?

-- 
   Richard Huxton
   Archonet Ltd