postgres

Andres Freund fe7337f2dc Fix off-by-one in decoding causing one-record events to be skipped. A ReorderBufferTransaction's end_lsn, the sentPtr advocated by walsender keepalive messages, and the end location remembered by the decoding get_changes SQL functions all use the location of the last read record + 1. I.e. the LSN points to the beginning of the next record. That cannot realistically be changed without changing the replication protocol because that's how keepalive messages have worked since 9.0. The bug is that the logic inside the snapshot builder, which decides whether a transaction's contents should be decoded, assumed the start location would point towards the last byte of the last record. The reason this didn't actually cause visible problems is that currently that decision is only made for commit records. Since interesting transactions always have at least one additional record - containing actual data - we'd never skip a transaction. But if there ever were transactions, or other events, with just one record containing important information, we'd skip them after stopping and restarting logical decoding.		12 years ago
config	Silence Bison deprecation warnings	12 years ago
contrib	Save pg_stat_statements statistics file into $PGDATA/pg_stat directory at shutdown.	12 years ago
doc	Consistently spell a replication slot's name as slot_name.	12 years ago
src	Fix off-by-one in decoding causing one-record events to be skipped.	12 years ago
.dir-locals.el	…
.gitattributes	…
.gitignore	…
COPYRIGHT	…
GNUmakefile.in	Add TAP tests for client programs	12 years ago
HISTORY	Improve text of stub HISTORY file.	12 years ago
Makefile	…
README	…
README.git	…
aclocal.m4	…
configure	Silence Bison deprecation warnings	12 years ago
configure.in	Support BSD and e2fsprogs UUID libraries alongside OSSP UUID library.	12 years ago

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:

	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/.