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fdf2dbda3f
The array containment operators now behave per mathematical expectation for empty arrays (ie, an empty array is contained in anything). Both these operators and the query_int operators now work as expected in GiST and GIN index searches, rather than having corner cases where the index searches gave different answers. Also, fix unexpected failures where the operators would claim that an array contained nulls, when in fact there was no longer any null present (similar to bug #5784). The restriction to not have nulls is still there, as removing it would take a lot of added code complexity and probably slow things down significantly. Also, remove the arbitrary restriction to 1-D arrays; unlike the other restriction, this was buying us nothing performance-wise. Assorted cosmetic improvements and marginal performance improvements, too. |
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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. 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/.