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Currently, we get the origin id from the name and then drop the origin by taking ExclusiveLock on ReplicationOriginRelationId. So, two concurrent sessions can get the id from the name at the same time and then when they try to drop the origin, one of the sessions will get the either "tuple concurrently deleted" or "cache lookup failed for replication origin ..". To prevent this race condition we do the entire operation under lock. This obviates the need for replorigin_drop() API and we have removed it so if any extension authors are using it they need to instead use replorigin_drop_by_name. See it's usage in pg_replication_origin_drop(). Author: Peter Smith Reviewed-by: Amit Kapila, Euler Taveira, Petr Jelinek, and Alvaro Herrera Discussion: https://www.postgresql.org/message-id/CAHut%2BPuW8DWV5fskkMWWMqzt-x7RPcNQOtJQBp6SdwyRghCk7A%40mail.gmail.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. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.