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When we implemented extensions, we made findDependentObjects() treat EXTENSION dependency links similarly to INTERNAL links. However, that logic contained an implicit assumption that an object could have at most one INTERNAL dependency, so it did not work correctly for objects having both INTERNAL and DEPENDENCY links. This led to failure to drop some extension member objects when dropping the extension. Furthermore, we'd never actually exercised the case of recursing to an internally-referenced (owning) object from anything other than a NORMAL dependency, and it turns out that passing the incoming dependency's flags to the owning object is the Wrong Thing. This led to sometimes dropping a whole extension silently when we should have rejected the drop command for lack of CASCADE. Since we obviously were under-testing extension drop scenarios, add some regression test cases. Unfortunately, such test cases require some extensions (duh), so we can't test for problems in the core regression tests. I chose to add them to the earthdistance contrib module, which is a good test case because it has a dependency on the cube contrib module. Back-patch to 9.1. Arguably these are pre-existing bugs in INTERNAL dependency handling, but since it appears that the cases can never arise pre-9.1, I'll refrain from back-patching the logic changes further than that. |
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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. 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/.