Re: Question Regarding Merge Append and Parallel Execution of Index Scans on Partitioned Table - Mailing list pgsql-hackers

From David Rowley
Subject Re: Question Regarding Merge Append and Parallel Execution of Index Scans on Partitioned Table
Date
Msg-id CAApHDvpdk5tBVp35x++d0ztEBMD0XUnYAydLd7q6K2yecRN_tw@mail.gmail.com
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In response to Re: Question Regarding Merge Append and Parallel Execution of Index Scans on Partitioned Table  (Ayush Vatsa <ayushvatsa1810@gmail.com>)
List pgsql-hackers
On Fri, 6 Jun 2025 at 07:49, Ayush Vatsa <ayushvatsa1810@gmail.com> wrote:
> That said, I’m wondering if this might not be necessary, given that
> Gather Merge already accomplishes similar functionality. Would
> love to hear your thoughts on whether there’s a distinct advantage to
> adding parallelism to Merge Append or if Gather Merge sufficiently
> covers all the use cases.

Gather Merge supports only a single subnode.  Merge Append supports any number.

David



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