20.04.2017 17:50, Dimitry Sibiryakov wrote:
> 20.04.2017 16:20, Vlad Khorsun wrote:
>>> 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".
>
> Union used to produce
20.04.2017 16:20, Vlad Khorsun wrote:
>> 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".
Union used to produce plan SORT (T1 NATURAL), SORT(T2 NATURAL). Both record
20.04.2017 15:49, Leyne, Sean wrote:
> "select f from t1 union select f from t2" is ONE statement with 2 parts!
>
> "Attachment" refers to the connection between a client and the server, it
> does not imply anything about how the engine might decompose a statement or
> how the parts could/would
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
>
