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This function gave the wrong answer when there's more than one RegisteredSnapshots entry, whether or not any of them is the CatalogSnapshot. This leads to assertion failure in some scenarios involving fetching toasted data using a cursor. (As per discussion, I'm dubious that this is the right contract to be enforcing at all; but it surely doesn't help to be enforcing it incorrectly.) Fetching toasted data using a cursor is evidently under-tested, so add a test case too. Per report from Erik Rijkers. This is new code, so no need for back-patch. Discussion: https://postgr.es/m/dc9dd229-ed30-6c62-4c41-d733ffff776b@xs4all.nl |
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README.git |
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/.