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9f9682783b
This allows AM-specific knowledge to be applied during creation of pg_amop and pg_amproc entries. Specifically, the AM knows better than core code which entries to consider as required or optional. Giving the latter entries the appropriate sort of dependency allows them to be dropped without taking out the whole opclass or opfamily; which is something we'd like to have to correct obsolescent entries in extensions. This callback also opens the door to performing AM-specific validity checks during opclass creation, rather than hoping than an opclass developer will remember to test with "amvalidate". For the most part I've not actually added any such checks yet; that can happen in a follow-on patch. (Note that we shouldn't remove any tests from "amvalidate", as those are still needed to cross-check manually constructed entries in the initdb data. So adding tests to "amadjustmembers" will be somewhat duplicative, but it seems like a good idea anyway.) Patch by me, reviewed by Alexander Korotkov, Hamid Akhtar, and Anastasia Lubennikova. Discussion: https://postgr.es/m/4578.1565195302@sss.pgh.pa.us |
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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: https://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 https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.