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The context is an object that no longer bears some aclitem that it bore initially. (A user issued REVOKE or GRANT statements upon the object.) pg_dump is forming SQL to reproduce the object ACL. Since initdb creates no ACL bearing GRANT OPTION, reaching this bug requires an extension where the creation script establishes such an ACL. No PGXN extension does that. If an installation did reach the bug, pg_dump would have omitted a semicolon, causing a REVOKE and the next SQL statement to fail. Separately, since the affected code exists to eliminate an entire aclitem, it wants plain REVOKE, not REVOKE GRANT OPTION FOR. Back-patch to 9.6, where commit 23f34fa4ba358671adab16773e79c17c92cbc870 first appeared. Discussion: https://postgr.es/m/20210109102423.GA160022@rfd.leadboat.com
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/.