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Put the unique path in the same context as the owning RelOptInfo, rather than the toplevel planner context. This is how this function worked originally, but commit f41803bb39bc2949db200116a609fd242d0ec221 changed it without explanation. mark_dummy_rel adopted the older (or newer?) technique in commit eca75a12a27d28b972fc269c1c8813cd8eb15441, which also featured a much better explanation of why it is correct. So, switch back to that technique here, with the same explanation given there. Although this fixes a possible memory leak when GEQO is in use, the leak is minor and probably nobody cares, so no back-patch. Ashutosh Bapat, reviewed by Tom Lane and by me Discussion: http://postgr.es/m/CAFjFpRcXkHHrXyD9BCvkgGJV4TnHG2SWJ0PhJfrDu3NAcQvh7g@mail.gmail.com
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/.