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In general it's not a good idea for built-in types in the 'U' category to be marked preferred; they could draw behavior away from user-defined types with similarly-named operators. pg_lsn is probably at low risk of that right now given the lack of casts between it and other types, but that doesn't make this marking OK. Ordinarily we'd bump catversion when changing any predefined catalog contents like this, but since we're past beta1, the costs of a forced initdb seem to outweigh the benefits of guaranteed behavioral consistency. There's not any known behavioral impact today anyway --- this is more in the nature of being sure there's not problems in future. Per an off-list complaint from Thomas Fanghaenel. |
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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: 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/.