73da6b8d1b
Currently, WaitForLSNReplay() immediately throws an error if waiting for LSN replay is not successful. This commit teaches WaitForLSNReplay() to return the result of waiting, while making pg_wal_replay_wait() responsible for throwing an appropriate error. This is preparation to adding 'no_error' argument to pg_wal_replay_wait() and new function pg_wal_replay_wait_status(), which returns the last wait result status. Additionally, we stop distinguishing situations when we find our instance to be not in a recovery state before entering the waiting loop and inside the waiting loop. Standby promotion may happen at any moment, even between issuing a procedure call statement and pg_wal_replay_wait() doing a first check of recovery status. Thus, there is no pointing distinguishing these situations. Also, since we may exit the waiting loop and see our instance not in recovery without throwing an error, we need to deleteLSNWaiter() in that case. We do this unconditionally for the sake of simplicity, even if standby was already promoted after reaching the target LSN, the startup process surely already deleted us. Reported-by: Michael Paquier Discussion: https://postgr.es/m/ZtUF17gF0pNpwZDI%40paquier.xyz Reviewed-by: Michael Paquier, Pavel Borisov |
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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/.