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Ordinarily we can omit checking of a WHERE condition that matches a partial index's condition, when we are using an indexscan on that partial index. However, in SELECT FOR UPDATE we must include the "redundant" filter condition in the plan so that it gets checked properly in an EvalPlanQual recheck. The planner got this mostly right, but improperly omitted the filter condition if the index in question was on an inheritance child table. In READ COMMITTED mode, this could result in incorrectly returning just-updated rows that no longer satisfy the filter condition. The cause of the error is using get_parse_rowmark() when get_plan_rowmark() is what should be used during planning. In 9.3 and up, also fix the same mistake in contrib/postgres_fdw. It's currently harmless there (for lack of inheritance support) but wrong is wrong, and the incorrect code might get copied to someplace where it's more significant. Report and fix by Kyotaro Horiguchi. Back-patch to all supported branches. |
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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. 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/.