Re: BUG #6052: ADD COLUMN - ERROR: tables can have at most 1600 columns

This isn't a bug so this isn't the place to discuss it.  If all you want to do is try and get a bunch of +1s for the idea, post your use case to -general and see who else agrees with you.  But I don't see it being very likely that this particular limit goes away.  Especially if the last reported request is from the 8.4 days of PostgreSQL and you aren't offering a patch.

A staging table that isn't built from scratch each time isn't a use case I'd be too interested in spending significant effort to handle.  And a test harness that doesn't have an initializer to build out clean first-run tables on demand falls into basically the same category.

David J.