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The code to change the deferrability properties of a foreign-key constraint updated all the associated triggers to match; but a moment's examination of the code that creates those triggers in the first place shows that only some of them should track the constraint's deferrability properties. This leads to odd failures in subsequent exercise of the foreign key, as the triggers are fired at the wrong times. Fix that, and add a regression test comparing the trigger properties produced by ALTER CONSTRAINT with those you get by creating the constraint as-intended to begin with. Per report from James Parks. Back-patch to 9.4 where this ALTER functionality was introduced. Report: <CAJ3Xv+jzJ8iNNUcp4RKW8b6Qp1xVAxHwSXVpjBNygjKxcVuE9w@mail.gmail.com>
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/.