Susanne Ebrecht <susanne@2ndQuadrant.com> writes:
> On 17.10.2011 16:41, Andreas Pflug wrote:
>> This is a little bit annoying on migration topics.
>> While not move on to a cleaner approach during the migration and use a
>> "boolean not null"?
>> Sounds much too straight forward, not mysql-ish artistic enough...
> Depends if you want / are able to touch the application source code or not.
If you're expecting to move a mysql application to postgres with zero
source code changes, you're living in a fantasy world anyway ... but
this difference is hardly likely to be your worst problem.
AFAICT the SQL standard is perfectly clear on this. *Values* of type
varchar can be of zero length, but that does not mean that you can
*declare* a column to be varchar(0), and that NOTE says specifically
that you can't.
regards, tom lane