Tablediff Bug?

Hey,

I recognized a strange behaviour when using tablediff. Because I don't want to replicate all columns, I create two views on selected attributes and compare them.

Have two tables:
create table t1 (timestamp timestamp, b int PRIMARY KEY, c varchar(30))create table t2 (b int PRIMARY KEY, c varchar(30))

and two views:
create view vt1 as select b, c from t1 create view vt2 as select b, c from t2

Compare the views with tablediff and get a failure:
... vt1 and vt2 ... have different schemas and cannot be compared.

Now I just find out that it works when table t2 also has a timestamp column.

drop table t2create table t2 (b int PRIMARY KEY, c varchar(30), ts timestamp)

Compare the views again with tablediff and get:
... vt1 and vt2 ... are identical.

What dou you think, do I always need the same datatypes in source- and target-table I want to compare, even if a create a subselection via views?

Cheers,