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Such indexes can only be duplicated leftovers of a previously failed REINDEX CONCURRENTLY command, and a valid equivalent is guaranteed to exist. As toast indexes can only be dropped if invalid, reindexing these would lead to useless duplicated indexes that can't be dropped anymore, except if the parent relation is dropped. Thanks to Justin Pryzby for reminding that this problem was reported long ago during the review of the original patch of REINDEX CONCURRENTLY, but the issue was never addressed. Reported-by: Sergei Kornilov, Justin Pryzby Author: Julien Rouhaud Reviewed-by: Michael Paquier Discussion: https://postgr.es/m/36712441546604286%40sas1-890ba5c2334a.qloud-c.yandex.net Discussion: https://postgr.es/m/20200216190835.GA21832@telsasoft.com Backpatch-through: 12 |
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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/.