"Pedro Gimeno" <pgsql-001(at)personal(dot)formauri(dot)es> writes:
> Description: Return type of MAX and MIN of a VARCHAR column is TEXT
This is not a bug. Most if not all operations with varchar will return
text --- it doesn't have its own operators.
> The last query's return types are both TEXT, which in Zeos are not treated
> in the same way as varchar.
I think you need to file a bug with Zeos to fix whatever their problem
is with text.
regards, tom lane