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pg_dump's original approach to handling extension member objects was to run around and clear (or set) their dump flags rather late in its data collection process. Unfortunately, quite a lot of code expects those flags to be valid before that; which was an entirely reasonable expectation before we added extensions. In particular, this explains Karsten Hilbert's recent report of pg_upgrade failing on a database in which an extension has been installed into the pg_catalog schema. Its objects are initially marked as not-to-be-dumped on the strength of their schema, and later we change them to must-dump because we're doing a binary upgrade of their extension; but we've already skipped essential tasks like making associated DO_SHELL_TYPE objects. To fix, collect extension membership data first, and incorporate it in the initial setting of the dump flags, so that those are once again correct from the get-go. This has the undesirable side effect of slightly lengthening the time taken before pg_dump acquires table locks, but testing suggests that the increase in that window is not very much. Along the way, get rid of ugly special-case logic for deciding whether to dump procedural languages, FDWs, and foreign servers; dump decisions for those are now correct up-front, too. In 9.3 and up, this also fixes erroneous logic about when to dump event triggers (basically, they were *always* dumped before). In 9.5 and up, transform objects had that problem too. Since this problem came in with extensions, back-patch to all supported versions. |
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| HISTORY | ||
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| README.git | ||
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README
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/.