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This function had a blacklist of dump object types that it believed needed exclusive lock ... but we hadn't maintained that, so that it was missing ROW SECURITY, POLICY, and INDEX ATTACH items, all of which need (or should be treated as needing) exclusive lock. Since the same oversight seems likely in future, let's reverse the sense of the test so that the code has a whitelist of safe object types; better to wrongly assume a command can't be run in parallel than the opposite. Currently the only POST_DATA object type that's safe is CREATE INDEX ... and that list hasn't changed in a long time. Back-patch to 9.5 where RLS came in. Discussion: https://postgr.es/m/11450.1535483506@sss.pgh.pa.us |
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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. 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/.