Re: Question Regarding Merge Append and Parallel Execution of Index Scans on Partitioned Table

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От Ayush Vatsa
Тема Re: Question Regarding Merge Append and Parallel Execution of Index Scans on Partitioned Table
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Msg-id CACX+KaOkMBXd1DTuo1Qn5J3=Gt+3bMT55ZcgOtxhndQO-ZE2cw@mail.gmail.com
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Ответ на Re: Question Regarding Merge Append and Parallel Execution of Index Scans on Partitioned Table  (David Rowley <dgrowleyml@gmail.com>)
Ответы Re: Question Regarding Merge Append and Parallel Execution of Index Scans on Partitioned Table
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> Merge Append does not support parallelism.
Thanks for the confirmation.

> We have Gather Merge, which handles executing some
sub-nodes and making sure the results get output in the correct order
A small follow-up question - Gather merge won't gather and merge the 
output from child in sorted order, but will always need an explicit Sort 
node beneath it to do so. Correct?

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Thanks,
Ayush Vatsa
SDE AWS

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