cf97080fa4
mess up after an aborted VACUUM FULL, per today's pghackers discussion. Add a suitable HeapTupleSatisfiesToast routine. Remove useless special- case test in HeapTupleSatisfiesVisibility macro for xmax = BootstrapTransactionId; perhaps that was needed at one time, but it's a waste of cycles now, not to mention actively wrong for SnapshotAny. Along the way, add some much-needed comments to tqual.c, and simplify toast_fetch_datum, which no longer needs to assume it may see chunks out-of-order.
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 several language bindings, including C, C++, Perl, Python, and Tcl, as well as drivers for JDBC and ODBC. 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. Changes between all PostgreSQL releases are recorded in the file HISTORY. 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 ftp://ftp.postgresql.org/pub/. For more information look at our web site located at http://www.postgresql.org/.