19.04.2017 15:56, Vlad Khorsun wrote:
>    And it does it already for a many years when fetching records in a batch 
> (default mode)

   Really? I see in sources that it send op_fetch only when in REM_fetch() it 
run out of 
data in buffer, not right after receiving batch.

>    We speak about parallel readers.

   Yes. And I'm trying to understand why so hackish and unclean implementation 
has favor 
over more versatile ones.
   Why derived transaction is better than flashback query?

-- 
   WBR, SD.

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