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ON CONFLICT unique index inference had a thinko that could affect cases where the user-supplied inference clause required that an attribute match a particular (user specified) collation and/or opclass. infer_collation_opclass_match() has to check for opclass and/or collation matches and that the attribute is in the list of attributes or expressions known to be in the definition of the index under consideration. The bug was that these two conditions weren't necessarily evaluated for the same index attribute. Author: Peter Geoghegan Discussion: CAM3SWZR4uug=WvmGk7UgsqHn2MkEzy9YU-+8jKGO4JPhesyeWg@mail.gmail.com Backpatch: 9.5, where ON CONFLICT was introduced
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/.