From: Tatsuo Ishii <t-ishii@sra.co.jp>
To: Thomas Lockhart <lockhart@alumni.caltech.edu>
Cc: robertC@opmr.com
Cc: pgsql-interfaces@postgreSQL.org
Subject: Re: [INTERFACES] How do I drop a column from a table?
Date: Tue, 31 Aug 1999 22:59:38 +0900
Message-ID: <199908311359.WAA00554@ext04.sra.co.jp> (raw)
In-Reply-To: <37CB7DE9.D22E7E45@alumni.caltech.edu>
> > I'm still quite new at this but it should be a simple operation: How do I
> > drop a column form a Postgres table. The next best thing would be knowing
> > how to change a column so that it can accept null values.
>
> Adding columns is directly supported. Removing columns, or redefining
> them, is done with a CREATE TABLE AS/DROP TABLE/CREATE TABLE AS/DROP
> TABLE sequence, where you write the columns you want to retain into a
> temporary table, delete the original table, and then do the same back
> into a new table with the same name as the original.
But this method might lose some characteristics such as primary key,
unique constraints, no?
---
Tatsuo Ishii
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To: pgsql-interfaces@postgresql.org
Cc: t-ishii@sra.co.jp, lockhart@alumni.caltech.edu, robertC@opmr.com
Subject: Re: [INTERFACES] How do I drop a column from a table?
In-Reply-To: <199908311359.WAA00554@ext04.sra.co.jp>
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