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In its original conception, it was leaving some objects into the old schema, but without their proper pg_depend entries; this meant that the old schema could be dropped, causing future pg_dump calls to fail on the affected database. This was originally reported by Jeff Frost as #6704; there have been other complaints elsewhere that can probably be traced to this bug. To fix, be more consistent about altering a table's subsidiary objects along the table itself; this requires some restructuring in how tables are relocated when altering an extension -- hence the new AlterTableNamespaceInternal routine which encapsulates it for both the ALTER TABLE and the ALTER EXTENSION cases. There was another bug lurking here, which was unmasked after fixing the previous one: certain objects would be reached twice via the dependency graph, and the second attempt to move them would cause the entire operation to fail. Per discussion, it seems the best fix for this is to do more careful tracking of objects already moved: we now maintain a list of moved objects, to avoid attempting to do it twice for the same object. Authors: Alvaro Herrera, Dimitri Fontaine Reviewed by Tom Lane |
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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/.