701cf1e317
The apply worker was using XactLastCommitEnd as local end_lsn for applying prepare and rollback_prepare. The XactLastCommitEnd value is the end lsn of the last commit applied before the prepare transaction which makes no sense. This LSN is used to decide whether we can send the acknowledgment of the corresponding remote LSN to the server. It is okay not to set the local_end LSN with the actual WAL position for the prepare because we always flush the prepare record. So, we can send the acknowledgment of the remote_end LSN as soon as prepare is finished. The current code is misleading but as such doesn't create any problem, so decided not to backpatch. Author: Hayato Kuroda Reviewed-by: Shveta Malik, Amit Kapila Discussion: https://postgr.es/m/TYAPR01MB5692FA4926754B91E9D7B5F0F5AA2@TYAPR01MB5692.jpnprd01.prod.outlook.com
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.