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This command, when used to add a column on a parent table with a complex inheritance tree, tried to update multiple times the same tuple in pg_attribute for a child table when incrementing attinhcount, causing failures with "tuple already updated by self" because of a missing CommandCounterIncrement() between two updates. This exists for a rather long time, so backpatch all the way down. Reported-by: Alexander Lakhin Author: Tender Wang Reviewed-by: Richard Guo Discussion: https://postgr.es/m/18297-b04cd83a55b51e35@postgresql.org Backpatch-through: 12 |
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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. Copyright and license information can be found in the file COPYRIGHT. General documentation about this version of PostgreSQL can be found at: https://www.postgresql.org/docs/devel/ In particular, information about building PostgreSQL from the source code can be found at: https://www.postgresql.org/docs/devel/installation.html The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.