Doc: add information about partition locking

David Rowley <drowley@postgresql.org>

Commit: 9b34f10ee050a115d2e02c1bec6de1bf31933970
Author: David Rowley <drowley@postgresql.org>
Date: 2025-04-02T01:04:10Z
Releases: 16.9
Doc: add information about partition locking

The documentation around locking of partitions for the executor startup
phase of run-time partition pruning wasn't clear about which partitions
were being locked.  Fix that.

Reviewed-by: Tender Wang <tndrwang@gmail.com>
Discussion: https://postgr.es/m/CAApHDvp738G75HfkKcfXaf3a8s%3D6mmtOLh46tMD0D2hAo1UCzA%40mail.gmail.com
Backpatch-through: 13

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doc/src/sgml/ddl.sgml modified +3 −1

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