Re: BUG #1290: Default value and ALTER...TYPE - Mailing list pgsql-bugs

On Wed, 20 Oct 2004 14:07:29 -0400, Tom Lane wrote:

> Hmm.  What's going on here is that the stored default expression is
> actually of the form
>     ('TODO'::varchar)::varchar(2)

Would it be possible to check the compatibility of a default value for
the associated column? Such a check might probably have to be limited to
checking of scalar default values - not function calls - to make it
doable.
This would be nice anyway, to catch stupid CREATE TABLE errors earlier.

If such a compatibility check could somehow be implemented, then the check
could be applied for

 - CREATE TABLE ...
 - ALTER TABLE ... ALTER COLUMN ... SET DEFAULT...
 - ALTER TABLE ... ALTER COLUMN ... TYPE...
 - CREATE DOMAIN ...

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