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es_query_dsa turns out to be broken by design, because it supposes that there is only one DSA for the whole query, whereas there is actually one per Gather (Merge) node. For now, work around that problem by setting and clearing the pointer around the sections of code that might need it. It's probably a better idea to get rid of es_query_dsa altogether in favor of having each node keep track individually of which DSA is relevant, but that seems like more than we would want to back-patch. Thomas Munro, reviewed and tested by Andreas Seltenreich, Amit Kapila, and by me. Discussion: http://postgr.es/m/CAEepm=1U6as=brnVvMNixEV2tpi8NuyQoTmO8Qef0-VV+=7MDA@mail.gmail.com |
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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: 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/.