Re: [GENERAL] Alter column...using failure under 9.0.4 - Mailing list pgsql-hackers

=?iso-8859-1?Q?Bj=F6rn_H=E4user?= <bjoernhaeuser@gmail.com> writes:
> Am 25.09.2011 um 17:17 schrieb Edson Carlos Ericksson Richter:
>> alter table usuario alter column ativo type smallint using (case when ativo then 1 else 0 end);
>> ERROR:  argument of IS FALSE must be type boolean, not type smallint

> you could check for indices or something like that.

Yeah, looks like expression index or CHECK constraint or something
similar that includes "ativo IS FALSE".

Note to hackers: I wonder whether we could make this a bit more
user-friendly by providing a CONTEXT line that shows which table
property we're trying to convert.

            regards, tom lane