Re: change existing table definition

Aehm sorry. ALTER TABLE is not only in PostgreSQL 8 ;). Only the
datatypes can be changed in postgres 8 (right?). I answered to fast.
I'm sorry.

CREATE TABLE newtable ( "bla" varchar(50));
CREATE INDEX/TRIGGER/... (with different names as the production table)
INSERT INTO newtable (select * from production);
ALTER TABLE production RENAME TO old;
ALTER TABLE newtable RENAME TO production;

If this is working correctly, you can drop the old INDEXES and
rename them.

If its not working correctly

ALTER TABLE production RENAME TO new;
ALTER TABLE old RENAME TO production;

and insert the different data (which is in the oldtable) into the
production table.

Greetings,
Martin

Am Dienstag, den 28.06.2005, 17:29 +0200 schrieb Martin Fandel:
> Hi
>
> ALTER TABLE is only in PostgreSQL 8. But you can create a new table
> with varchar(50) and copy the data from the existing into the new
> table. How much relation_size has your table? Do you create the
> dbsize-functions which are included in the contrib package?
>
> Best regards,
> Martin
>
> Am Dienstag, den 28.06.2005, 10:39 -0400 schrieb Chuming Chen:
> > Peter Eisentraut wrote:
> >
> > >Chuming Chen wrote:
> > >
> > >
> > >>How can I change the column definition of an existing table, ie. from
> > >>varchar(30) to varchar(50)? Is there any way to add a new column to
> > >>an existing table?
> > >>
> > >>
> > >
> > >The ALTER TABLE command can do all that. You need version 8.0 or later
> > >for some functionality though.
> > >
> > >
> > >
> > Is there another way to do it in 7.* ?
> >
> > ---------------------------(end of broadcast)---------------------------
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