Greetings.
One can issue an empty `SELECT` statement and 1 row without columns will be
returned:
postgres=# select;
--
(1 row)
However, if I'll do `EXCPET` or `INTERSECT` of such queries, I'll get 2
rows:
postgres=# select except select;
--
(2 rows)
postgres=# select intersect all select;
--
(2 rows)
Why is it so?
Should this be reported as a bug?.. ;)
--
Victor Yegorov