postgresql/src
Alvaro Herrera 5a10c262fc
Fix replay of create database records on standby
Crash recovery on standby may encounter missing directories
when replaying database-creation WAL records.  Prior to this
patch, the standby would fail to recover in such a case;
however, the directories could be legitimately missing.
Consider the following sequence of commands:

    CREATE DATABASE
    DROP DATABASE
    DROP TABLESPACE

If, after replaying the last WAL record and removing the
tablespace directory, the standby crashes and has to replay the
create database record again, crash recovery must be able to continue.

A fix for this problem was already attempted in 49d9cfc68b, but it
was reverted because of design issues.  This new version is based
on Robert Haas' proposal: any missing tablespaces are created
during recovery before reaching consistency.  Tablespaces
are created as real directories, and should be deleted
by later replay.  CheckRecoveryConsistency ensures
they have disappeared.

The problems detected by this new code are reported as PANIC,
except when allow_in_place_tablespaces is set to ON, in which
case they are WARNING.  Apart from making tests possible, this
gives users an escape hatch in case things don't go as planned.

Author: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Author: Asim R Praveen <apraveen@pivotal.io>
Author: Paul Guo <paulguo@gmail.com>
Reviewed-by: Anastasia Lubennikova <lubennikovaav@gmail.com> (older versions)
Reviewed-by: Fujii Masao <masao.fujii@oss.nttdata.com> (older versions)
Reviewed-by: Michaël Paquier <michael@paquier.xyz>
Diagnosed-by: Paul Guo <paulguo@gmail.com>
Discussion: https://postgr.es/m/CAEET0ZGx9AvioViLf7nbR_8tH9-=27DN5xWJ2P9-ROH16e4JUA@mail.gmail.com
2022-07-28 08:26:05 +02:00
..
backend Fix replay of create database records on standby 2022-07-28 08:26:05 +02:00
bin Fix \watch's interaction with libedit on ^C. 2022-07-10 16:55:18 +12:00
common Inhibit mingw CRT's auto-globbing of command line arguments 2022-04-25 15:51:27 -04:00
fe_utils Clean up assorted failures under clang's -fsanitize=undefined checks. 2022-03-03 18:13:24 -05:00
include Allow "in place" tablespaces. 2022-07-27 07:55:12 +02:00
interfaces Fix previous commit's ecpg_clocale for ppc Darwin. 2022-07-02 21:03:24 -07:00
makefiles Select CFLAGS_SL at configure time, not in platform-specific Makefiles. 2019-10-21 12:32:36 -04:00
pl Fix SPI's handling of errors during transaction commit. 2022-06-22 12:12:00 -04:00
port Stamp 11.16. 2022-05-09 17:20:11 -04:00
template Further tweaking of PG_SYSROOT heuristics for macOS. 2021-01-20 12:07:41 -05:00
test Fix replay of create database records on standby 2022-07-28 08:26:05 +02:00
timezone Update time zone data files to tzdata release 2022a. 2022-05-05 14:55:22 -04:00
tools Improve setup of environment values for commands in MSVC's vcregress.pl 2022-05-11 10:22:40 +09:00
tutorial tutorial: land height is "elevation", not "altitude" 2021-03-10 20:25:18 -05:00
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
DEVELOPERS Replace a couple of references to files that no longer exist in the source 2009-05-04 08:08:47 +00:00
Makefile Fix partial-build problems introduced by having more generated headers. 2018-04-09 16:42:10 -04:00
Makefile.global.in Fix prove_installcheck to use correct paths when used with PGXS 2021-07-01 08:47:21 -04:00
Makefile.shlib Ensure static libraries have correct mod time even if ranlib messes it up. 2018-11-29 15:53:44 -05:00
nls-global.mk nls-global.mk: search build dir for source files, too 2016-06-07 18:55:18 -04:00