20.04.2017 13:04, Dimitry Sibiryakov wrote:
> 19.04.2017 14:12, Vlad Khorsun wrote:
>>     Engine can't run more than one statement in attachment at same time. 
>> This will not be
>> changed.
> 
>     Does it also mean that Firebird will never be able to execute parts of 
> single query in
> parallel 

   No, it doesn't

> even in the simplest cases like "select f from t1 union select f from t2"?

   This case nor simplest nor better for parallel execution than "ordinary" 
"select * from t".

Vlad

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