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Commit d22a09dc70f9830fa78c1cd1a3a453e4e473d354 introduced official support for GiST consistentFns that want to cache data using the FmgrInfo fn_extra pointer: the idea was to preserve the cached values across gistrescan(), whereas formerly they'd been leaked. However, there was an oversight in that, namely that multiple scan keys might reference the same column's consistentFn; the code would result in propagating the same cache value into multiple scan keys, resulting in crashes or wrong answers. Use a separate array instead to ensure that each scan key keeps its own state. Per bug #8143 from Joel Roller. Back-patch to 9.2 where the bug was introduced.
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/.