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Michael Paquier a76cfba663 Add safeguards in LSN, numeric and float calculation for custom errors 
Those data types use parsing and/or calculation wrapper routines which
can generate some generic error messages in the event of a failure.  The
caller of these routines can also pass a pointer variable settable by
the routine to track if an error has happened, letting the caller decide
what to do in the event of an error and what error message to generate.

Those routines have been slacking the initialization of the tracking
flag, which can be confusing when reading the code, so add some
safeguards against calls of these parsing routines which could lead to a
dubious result.

The LSN parsing gains an assertion to make sure that the tracking flag
is set, while numeric and float paths initialize the flag to a saner
state.

Author: Jeevan Ladhe
Reviewed-by: Álvaro Herrera, Michael Paquier
Discussion: https://postgr.es/m/CAOgcT0NOM9oR0Hag_3VpyW0uF3iCU=BDUFSPfk9JrWXRcWQHqw@mail.gmail.com
 		2019-08-05 15:35:16 +09:00
config Update config.guess and config.sub 2019-04-27 14:25:00 +02:00
contrib Fix inconsistencies and typos in the tree, take 9 2019-08-05 12:14:58 +09:00
doc Fix inconsistencies and typos in the tree, take 9 2019-08-05 12:14:58 +09:00
src Add safeguards in LSN, numeric and float calculation for custom errors 2019-08-05 15:35:16 +09:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.gitattributes Add XSL stylesheet to fix up SVG files 2019-06-19 21:26:42 +02:00
.gitignore Support for optimizing and emitting code in LLVM JIT provider. 2018-03-22 11:05:22 -07:00
COPYRIGHT Update copyright for 2019 2019-01-02 12:44:25 -05:00
GNUmakefile.in Integrate cpluspluscheck into build system. 2019-05-31 12:36:17 -07:00
HISTORY Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
Makefile Don't unset MAKEFLAGS in non-GNU Makefile. 2019-06-25 09:36:21 +12:00
README Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
README.git Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
aclocal.m4 Fix configure's AC_CHECK_DECLS tests to work correctly with clang. 2018-11-19 12:01:47 -05:00
configure Remove support for non-ELF BSD systems 2019-07-01 23:56:20 +01:00
configure.in Remove support for non-ELF BSD systems 2019-07-01 23:56:20 +01:00

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/.