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Mirror of the official PostgreSQL GIT repository. Note that this is just a *mirror* - we don't work with pull requests on github. To contribute, please see https://wiki.postgresql.org/wiki/Submitting_a_Patch
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Álvaro Herrera d5845aa8ad
Don't error out when dropping constraint if relchecks is already zero 
I have never seen this be a problem in practice, but it came up when
purposely corrupting catalog contents to study the fix for a nearby bug:
we'd try to decrement relchecks, but since it's zero we error out and
fail to drop the constraint.  The fix is to downgrade the error to
warning, skip decrementing the counter, and otherwise proceed normally.

Given lack of field complaints, no backpatch.

Author: Álvaro Herrera <alvherre@kurilemu.de>
Discussion: https://postgr.es/m/202508291058.q2zscdcs64fj@alvherre.pgsql
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README.md

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/.