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< Last updated: Sat May 5 10:47:39 EDT 2007 > Last updated: Sat May 5 11:39:57 EDT 2007 < * Flush cached query plans when the dependent objects change, < when the cardinality of parameters changes dramatically, or > * -Flush cached query plans when the dependent objects change or < < A more complex solution would be to save multiple plans for different < cardinality and use the appropriate plan based on the EXECUTE values. < < * Track dependencies in function bodies and recompile/invalidate < < This is particularly important for references to temporary tables < in PL/PgSQL because PL/PgSQL caches query plans. The only workaround < in PL/PgSQL is to use EXECUTE. One complexity is that a function < might itself drop and recreate dependent tables, causing it to < invalidate its own query plan. < < * Invalidate prepared queries, like INSERT, when the table definition > * -Track dependencies in function bodies and recompile/invalidate > * -Invalidate prepared queries, like INSERT, when the table definition |
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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 including some of the more common listed below: C++ - http://thaiopensource.org/development/libpqxx/ JDBC - http://jdbc.postgresql.org ODBC - http://odbc.postgresql.org Perl - http://search.cpan.org/~dbdpg/ PHP - http://www.php.net Python - http://www.initd.org/ Ruby - http://ruby.scripting.ca/postgres/ Other language binding are available from a variety of contributing parties. PostgreSQL also has a great number of procedural languages available, a short but not complete list is below: PL/pgSQL - included in PostgreSQL source distribution PL/Perl - included in PostgreSQL source distribution PL/PHP - http://projects.commandprompt.com/projects/public/plphp PL/Python - included in PostgreSQL source distribution PL/Java - http://gborg.postgresql.org/project/pljava/projdisplay.php PL/Tcl - included in PostgreSQL source distribution 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/.