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This function currently lacks the option to throw error if the provided targetlist doesn't have any matching entry for a Var to be replaced. Two of the four existing call sites would be better off with an error, as would the usage in the pending auto-updatable-views patch, so it seems past time to extend the API to support that. To do so, replace the "event" parameter (historically of type CmdType, though it was declared plain int) with a special-purpose enum type. It's unclear whether this function might be called by third-party code. Since many C compilers wouldn't warn about a call site continuing to use the old calling convention, rename the function to forcibly break any such code that hasn't been updated. The old name was none too well chosen anyhow.
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. Changes between all PostgreSQL releases are recorded in the file HISTORY. 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/.