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foreign keys, one more time. Insist on matching up all three triggers before we create a constraint; this will avoid creation of duplicate constraints in scenarios where a broken FK constraint was repaired by re-adding the constraint without removing the old partial trigger set. Basically, this will work nicely in all cases where the FK was actually functioning correctly in the database that was dumped. It will fail to restore an FK in just one case where we theoretically could restore it: where we find the referenced table's triggers and not the referencing table's trigger. However, in such a scenario it's likely that the user doesn't even realize he still has an FK at all (since the more-likely-to-fail cases aren't enforced), and we'd probably not accomplish much except to cause the reload to fail because the data doesn't meet the FK constraint. Also make the NOTICE logging still more verbose, by adding detail about which of the triggers were found. This seems about all we can do without solving the problem of getting the user's attention at session end. |
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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/.