Message-ID: <3E8088E1.5030700@web.de>
Date: Tue, 25 Mar 2003 17:50:41 +0100
From: Andreas Pflug <Andreas.Pflug@web.de>
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To: pgsql-sql@postgresql.org
Subject: Re: How to increase Column width of table
References: <3E807332.9C5EBEE@rodos.fzk.de>
In-Reply-To: <3E807332.9C5EBEE@rodos.fzk.de>
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Christoph Haller wrote:

>I'm afraid there is no one-step-solution to this.
>You'll have to go the hard way as
>
>CREATE new_table (
>...
>... varchar(100),
>...
>);
>INSERT INTO new_table as SELECT * FROM old_table;
>DROP old_table;
>ALTER TABLE new_table RENAME TO old_table;
>And don't forget about re-creating related indexes etc.
>
>Regards, Christoph
>  
>
This has many side effects, like dropped indices that have to be 
recreated etc.
You can rename your old column, create a new column varchar(100), update 
... set newCol=oldCol, drop oldCol and rename newCol to oldCol
See ALTER TABLE doc for this.

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