39a0db1011
heapgettup_advance_block() (or heapgettup() and heapgettup_pagemode() in versions before v16) would incorrectly decrement rs_numblocks when advancing to the next block. Ordinarily this was fine, but if the TID Range scan plan was used by a scrollable cursor and the cursor was fetched backwards enough to result in another block being required, then rs_numblocks may have reached 0 prematurely resulting in the scan ending prematurely. Reported-by: Jeff Davis <pgsql@j-davis.com> Author: Ewan Young <kdbase.hack@gmail.com> Author: David Rowley <dgrowleyml@gmail.com> Discussion: https://postgr.es/m/6b50233fcc0f7d6f4845f083777fa9702d9612e4.camel@j-davis.com Backpatch-through: 14
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/18/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/18/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/.