Hi,

On 2021-03-29 11:48:47 +1300, David Rowley wrote:
> I've done that in the attached.  I added the
> ParallelBlockTableScanWorkerData as a pointer field in
> HeapScanDescData and change it so we only allocate memory for it for
> just parallel scans.  The field is left as NULL for non-parallel
> scans.

LGTM.

> I've also added a pfree in heap_endscan() to free the memory when the
> pointer is not NULL. I'm hoping that'll fix the valgrind warning, but
> I've not run it to check.

Cool. I think that's a good thing to do. The leak itself should already
be fixed, and was more my fault...

commit 415ffdc2205e209b6a73fb42a3fdd6e57e16c7b2
Author: Tom Lane <t...@sss.pgh.pa.us>
Date:   2021-03-18 20:50:56 -0400

    Don't run RelationInitTableAccessMethod in a long-lived context.


Greetings,

Andres Freund


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