Hi,

the following select fetches all records of the table (FB 2.5.4) and obviously brings no resultset.

select * from Mytable where 1=0

Is there a trick to force Firebird not to scan all records?

We sometimes use such a statement (in for select loops) to get different datasets and process it in the loop.
select ... from Table1 where :InputParam = 'A'
union

select ... from Table2 where :InputParam = 'B'

Regards,

Josef