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The tlist of the EvalPlanQual outer plan for a ForeignScan node is adjusted to produce a tuple whose descriptor matches the scan tuple slot for the ForeignScan node. But in the case where the outer plan contains an extra Sort node, if the new tlist contained columns required only for evaluating PlaceHolderVars or columns required only for evaluating local conditions, this would cause setrefs.c to fail with the error. The cause of this is that when creating the outer plan by injecting the Sort node into an alternative local join plan that could emit such extra columns as well, we fail to arrange for the outer plan to propagate them up through the Sort node, causing setrefs.c to fail to match up them in the new tlist to what is available from the outer plan. Repair. Per report from Alexander Pyhalov. Richard Guo and Etsuro Fujita, reviewed by Alexander Pyhalov and Tom Lane. Backpatch to all supported versions. Discussion: http://postgr.es/m/cfb17bf6dfdf876467bd5ef533852d18%40postgrespro.ru |
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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/.