Subject Re: Firebird 2.1.3 optimizer in does not use index - Email found in subject
Author Andreas Rulle
Hello Milan,

yes, your advice results into the usage of the index on T1!

> select t1.s1 from t1 left join t2 on t1.s1=t2.s1
> WHERE T1.S1 = 1
>
> Now you get what you're expecting.

With the where clause FlameRobin reports

PLAN JOIN (T1 INDEX (IDX_T11), T2 INDEX (IDX_T12))

Greetings

Andreas