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These calls were removed in commit 4240e429d0c2d889d0cda23c618f94e12c13ade7 as part of a general refactoring and improvement of DDL locking. However, there's a problem not solved by the rewrite, which is that GRANT/REVOKE update pg_class.relacl without taking any particular lock on the target table as such. If another backend fails to do AcceptInvalidationMessages, it won't notice a recently-committed change in ACLs. Bug #7557 from Piotr Czachur demonstrates that there's at least one code path in 9.2.0 in which a command fails to do any AcceptInvalidationMessages calls at all, if the current transaction already holds all the locks it will need. Since we're hard up against the release deadline for 9.2.1, fix this by putting back the AcceptInvalidationMessages calls in heap_openrv and heap_openrv_extended, thereby restoring the historical behavior in this area. We ought to look for a more elegant and perhaps more bulletproof solution, but there's no time for that right now.
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: http://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. Changes between all PostgreSQL releases are recorded in the file HISTORY. 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 http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.