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During expand_security_quals, we take the security barrier quals on an RTE and create a subquery which evaluates the quals. During this, we have to replace any variables in the outer query which refer to the original RTE with references to the columns from the subquery. We need to also perform that replacement for any Vars in the append_rel_list. Only backpatching to 9.5 as we only go through this process in 9.4 for auto-updatable security barrier views, which UNION ALL queries aren't. Discovered by Haribabu Kommi Patch by Dean Rasheed |
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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/.