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lo_open registers the currently active snapshot, and checks if the large object exists after that. Normally, snapshots registered by lo_open are unregistered at end of transaction when the lo descriptor is closed, but if we error out before the lo descriptor is added to the list of open descriptors, it is leaked. Fix by moving the snapshot registration to after checking if the large object exists. Reported by Pavel Stehule. Backpatch to 8.4. The snapshot registration system was introduced in 8.4, so prior versions are not affected (and not supported, anyway). |
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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: 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/.