[firebird-support] SQL performance SS FB 3.0.1 vs SC FB 2.5.2

[trsk...@yahoo.com [firebird-support]]

Hi guys,

Just found that on a particular case, SS FB 3.0.1 is about 4x slower than SC FB 
2.5.2.

Here is the query : 
==========================
select a.id,b.nm from tbl1 a, tbl2 b 
where a.id = b.id 
and a.id in (select c.id from tbl3 c)

If the query change to this :
==========================
select a.id,b.nm from tbl1 a, tbl2 b, tbl3 c 
where a.id = b.id 
and a.id = c.id

SC FB 2.5.2 is about 1.3x faster than SS FB 3.0.1.

Regards,
Anto