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f47b602df8
Can't release the AccessExclusiveLock on the target table until commit. Otherwise there is a race condition whereby other backends might service our cache invalidation signals before they can actually see the updated catalog rows. Just to add insult to injury, RemovePolicyById was closing the rel (with incorrect lock drop) and then passing the now-dangling rel pointer to CacheInvalidateRelcache. Probably the reason this doesn't fall over on CLOBBER_CACHE buildfarm members is that some outer level of the DROP logic is still holding the rel open ... but it'd have bit us on the arse eventually, no doubt.
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. 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/.