3850723208
transformOnConflictClause incremented p_next_resno while generating the phony targetlist for the EXCLUDED pseudo-rel. Then that field got incremented some more during transformTargetList, possibly leading to free_parsestate concluding that we'd overrun the allowed length of a tlist, as reported by Justin Pryzby. We could fix this by resetting p_next_resno to 1 after using it for the EXCLUDED pseudo-rel tlist, but it seems easier and less coupled to other places if we just don't use that field at all in this loop. (Note that this doesn't change anything about the resnos that end up appearing in the main target list, because those are all replaced with target-column numbers by updateTargetListEntry.) In passing, fix incorrect type OID assigned to the whole-row Var for "EXCLUDED.*" (somehow this escaped having any bad consequences so far, but it's certainly wrong); remove useless assignment to var->location; pstrdup the column names in case of a relcache flush; and improve nearby comments. Back-patch to 9.5 where ON CONFLICT was introduced. Report: https://postgr.es/m/20161204163237.GA8030@telsasoft.com |
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README
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/.