Re: delete column

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От Mathieu Arnold
Тема Re: delete column
Дата
Msg-id 10439662.1019909411@tot.in.t-online.fr
обсуждение исходный текст
Ответ на Re: delete column  ("Hillensbeck, Preston" <PHillensbeck@sfbcic.com>)
Список pgsql-general

--On vendredi 26 avril 2002 15:49 -0500 "Hillensbeck, Preston"
<PHillensbeck@sfbcic.com> wrote:

> There isn't a DROP COLUMN function yet, but you can do this...
>
> SELECT ... -- select all columns but the one you want to remove
> INTO TABLE new_table
> FROM old_table;
> DROP TABLE old_table;
> ALTER TABLE new_table RENAME TO old_table;
>
> This is straight out of Bruce Momjian's book, so you can give him credit
> for this :)

this is not really good, as you loose all defaults from the table.
I believe that
CREATE TABLE new_table (fields without the one you want);
INSERT INTO new_table SELECT ... FROM old_table;
DROP TABLE old_table;
ALTER TABLE new_table RENAME to old_table;


--
Mathieu Arnold

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