mirror of
https://github.com/postgres/postgres.git
synced 2025-04-24 10:47:04 +03:00
9a109452da
collect_corrupt_items() failed to initialize tuple.t_self. While HeapTupleSatisfiesVacuum() doesn't actually use that value, it does Assert that it's valid, so that the code would dump core if ip_posid chanced to be zero. (That's somewhat unlikely, which probably explains how this got missed. In any case it wouldn't matter for field use.) Also, collect_corrupt_items was returning the wrong TIDs, that is the contents of t_ctid rather than the tuple's own location. This would be the same thing in simple cases, but it could be wrong if, for example, a past update attempt had been rolled back, leaving a live tuple whose t_ctid doesn't point at itself. Also, in pg_visibility(), guard against trying to read a page past the end of the rel. The VM code handles inquiries beyond the end of the map by silently returning zeroes, and it seems like we should do the same thing here. I ran into the assertion failure while using pg_visibility to check pg_upgrade's behavior, and then noted the other problems while reading the code. Report: <29043.1475288648@sss.pgh.pa.us>
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: http://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 http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.