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Previously, rewriteTargetListIU() generated a list of attribute numbers from the targetlist, which were passed to rewriteValuesRTE(), which expected them to contain the same number of entries as there are columns in the VALUES RTE, and to be in the same order. That was fine when the target relation was a table, but for an updatable view it could be broken in at least three different ways --- rewriteTargetListIU() could insert additional targetlist entries for view columns with defaults, the view columns could be in a different order from the columns of the underlying base relation, and targetlist entries could be merged together when assigning to elements of an array or composite type. As a result, when recursing to the base relation, the list of attribute numbers generated from the rewritten targetlist could no longer be relied upon to match the columns of the VALUES RTE. We got away with that prior to |
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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/.