Hi,
I have found a bug in PostgreSQL doing "except all". Some records are
removed from the result, even though they should stay. Except all removed
records which were _not_ in the table that were excepted from the original
table.
I have put the data and small python code here:
http://www.webit.hu/~gerzson/pgexceptbugtest.tgz
Thank you in advance,
Gerzson Szinyei