Returning an empty dataset

I just needed the column list of the resulting query for a field picklist,
so I surrounded the original query AABB by

SELECT * FROM
(AABB) T
WHERE FALSE

But unfortunately this fails if the original query AABB was segmented...
(multiple SQL statements like creating an index and then returning data
using a select statement)

So I decided to change all the SELECT keywords into SELECT TOP 0 and then
returning the query result.

But hey, this is strange: I get ALL records back? SELECT TOP 1 returns one
record, SELECTR TOP 2 returns two records, but SELECT TOP 0 returns all
records?

Bug or WAD?

Regards - hans