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6db4b49986
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Teodor Sigaev 6db4b49986 Fix wrong validation of top-parent pointer during page deletion in Btree. 
After introducing usage of t_tid of inner or page high key for storing
number of attributes of tuple, validation of tuple's ItemPointer with
ItemPointerIsValid becomes incorrect, it's need to validate only blocknumber of
ItemPointer. Missing this causes a incorrect page deletion, fix that. Test is
added.

BTW, current contrib/amcheck doesn't fail on index corrupted by this way.

Also introduce BTreeTupleGetTopParent/BTreeTupleSetTopParent macroses to improve
code readability and to avoid possible confusion with page high key: high key
is used to store top-parent link for branch to remove.

Bug found by Michael Paquier, but bug doesn't exist in previous versions because
t_tid was set to P_HIKEY.

Author: Teodor Sigaev
Reviewer: Peter Geoghegan
Discussion: https://www.postgresql.org/message-id/flat/20180419052436.GA16000%40paquier.xyz
2018-04-23 15:55:10 +03:00
config Use ARMv8 CRC instructions where available. 2018-04-04 12:22:45 +03:00
contrib Change more places to be less trusting of RestrictInfo.is_pushed_down. 2018-04-20 15:19:16 -04:00
doc Add missing documentation for BGWORKER_BYPASS_ALLOWCONN 2018-04-22 14:03:36 +02:00
src Fix wrong validation of top-parent pointer during page deletion in Btree. 2018-04-23 15:55:10 +03:00
.dir-locals.el
.gitattributes Remove contrib/tsearch2. 2017-02-13 11:06:11 -05:00
.gitignore Support for optimizing and emitting code in LLVM JIT provider. 2018-03-22 11:05:22 -07:00
aclocal.m4 Add configure infrastructure (--with-llvm) to enable LLVM support. 2018-03-20 17:26:25 -07:00
configure Use ARMv8 CRC instructions where available. 2018-04-04 12:22:45 +03:00
configure.in Use ARMv8 CRC instructions where available. 2018-04-04 12:22:45 +03:00
COPYRIGHT
GNUmakefile.in
HISTORY Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
Makefile
README
README.git

README 

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/.