Re: Alter field type?

That looks like a recipe, thx... :)

BTJ

Tino Wildenhain wrote:
> Hi,
>
> Am Do, den 26.08.2004 schrieb Bjørn T Johansen um 9:48:
>
>>Is it possible to alter field type (from varchar to text) without making
>>a new table?
>
>
> In 8.0 I think.
> Common practice in 7.4.x is:
>
> BEGIN work;
> ALTER TABLE yourtable ADD COLUMN tempcolumn text;
> UPDATE yourtable SET tempcolumn = origcolumn;
> ALTER TABLE yourtable DROP COLUMN origcolumn;
> ALTER TABLE yourtable RENAME tempcolumn TO origcolumn;
> COMMIT work;
>
> Since text and (unlimited) varchar are quite the same,
> you could get away with modifying the system tables.
> But I would not recomment to do so.
>
> Regards
> Tino Wildenhain
>

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