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The code here would need some change anyway given planned change in SPI_modifytuple semantics, since this executes after we've exited the SPI environment. But really it's better to just use heap_modify_tuple. The code's actually shorter this way, and this avoids depending on some rather indirect reasoning about why the temporary arrays can't be overrun. (I think the old code is safe, as long as Perl hashes can't contain duplicate keys; but with this way we don't need that assumption, only the assumption that SPI_fnumber doesn't return an out-of-range attnum.) While at it, normalize use of SPI_fnumber: make error messages distinguish no-such-column from can't-set-system-column, and remove test for deleted column which is going to migrate into SPI_fnumber. |
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README.git |
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/.