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Michael Paquier df4a056619 Add more error context to RestoreBlockImage() and consume it 
On failure in restoring a block image, no details were provided, while
it is possible to see failure with an inconsistent record state, a
failure in processing decompression or a failure in decompression
because a build does not support this option.

RestoreBlockImage() is used in two code paths in the backend code,
during recovery and when checking a page consistency after applying
masking, and both places are changed to consume the error message
produced by the internal routine when it returns a false status.  All
the error messages are reported under ERRCODE_INTERNAL_ERROR, that gets
used also when attempting to access a page compressed by a method
not supported by the build attempting the decompression.  This is
something that can happen in core when doing physical replication with
primary and standby using inconsistent build options, for example.

This routine is available since 2c03216d and it has never provided any
context about the error happening when it failed.  This change is
justified even more after 57aa5b2, that introduced compression of FPWs
in WAL.

Reported-by: Justin Prysby
Author: Michael Paquier
Discussion: https://postgr.es/m/20220905002320.GD31833@telsasoft.com
Backpatch-through: 15
 		2022-09-09 10:00:40 +09:00
config Remove further unwanted linker flags from perl_embed_ldflags 2022-08-23 16:27:24 +02:00
contrib Fix an assortment of improper usages of string functions 2022-09-06 13:19:44 +12:00
doc doc: Fix PL/pgSQL casing to be consistent 2022-09-08 09:56:50 +02:00
src Add more error context to RestoreBlockImage() and consume it 2022-09-09 10:00:40 +09:00
.cirrus.yml ci: remove minor version from freebsd image name 2022-07-31 18:51:47 -07:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.editorconfig Add .editorconfig 2019-12-18 09:13:13 +01:00
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.gitattributes Remove trailing whitespace from *.sgml files. 2022-04-20 11:04:49 -04:00
.gitignore Support for optimizing and emitting code in LLVM JIT provider. 2018-03-22 11:05:22 -07:00
COPYRIGHT Update copyright for 2022 2022-01-07 19:04:57 -05:00
GNUmakefile.in Run tests of libpq on installcheck-world, checkprep and check-world 2022-06-03 13:15:20 +09:00
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
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README Canonicalize some URLs 2020-02-10 20:47:50 +01:00
README.git Canonicalize some URLs 2020-02-10 20:47:50 +01:00
aclocal.m4 Probe $PROVE not $PERL while checking for modules needed by TAP tests. 2021-11-22 12:54:52 -05:00
configure Remove configure probe for sockaddr_in6 and require AF_INET6. 2022-08-26 10:18:30 +12:00
configure.ac Remove configure probe for sockaddr_in6 and require AF_INET6. 2022-08-26 10:18:30 +12:00

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/.