5e5f4fcd89
The foreign server OID stored in the connection cache entry is used as a lookup key to directly get the server name. Previously since the connection cache entry did not have the server OID, postgres_fdw had to get the server OID at first from user mapping before getting the server name. So if the corresponding user mapping was dropped, postgres_fdw could raise the error "cache lookup failed for user mapping" while looking up user mapping and fail to get the server name even though the server had not been dropped yet. Author: Bharath Rupireddy Reviewed-by: Fujii Masao Discussion: https://postgr.es/m/CALj2ACVRZPUB7ZwqLn-6DY8C_UmPs6084gSpHA92YBv++1AJXA@mail.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/.