From 39969e2a1e4d7f5a37f3ef37d53bbfe171e7d77a Mon Sep 17 00:00:00 2001
From: Stephen Frost
Date: Wed, 6 Apr 2022 14:41:03 -0400
Subject: Remove exclusive backup mode

Exclusive-mode backups have been deprecated since 9.6 (when
non-exclusive backups were introduced) due to the issues
they can cause should the system crash while one is running and
generally because non-exclusive provides a much better interface.
Further, exclusive backup mode wasn't really being tested (nor was most
of the related code- like being able to log in just to stop an exclusive
backup and the bits of the state machine related to that) and having to
possibly deal with an exclusive backup and the backup_label file
existing during pg_basebackup, pg_rewind, etc, added other complexities
that we are better off without.

This patch removes the exclusive backup mode, the various special cases
for dealing with it, and greatly simplifies the online backup code and
documentation.

Authors: David Steele, Nathan Bossart
Reviewed-by: Chapman Flack
Discussion: https://postgr.es/m/ac7339ca-3718-3c93-929f-99e725d1172c@pgmasters.net
https://postgr.es/m/CAHg+QDfiM+WU61tF6=nPZocMZvHDzCK47Kneyb0ZRULYzV5sKQ@mail.gmail.com
---
 src/include/miscadmin.h | 4 ----
 1 file changed, 4 deletions(-)

(limited to 'src/include/miscadmin.h')

diff --git a/src/include/miscadmin.h b/src/include/miscadmin.h
index 0abc3ad5405..9321d7f264b 100644
--- a/src/include/miscadmin.h
+++ b/src/include/miscadmin.h
@@ -481,10 +481,6 @@ extern void process_session_preload_libraries(void);
 extern void pg_bindtextdomain(const char *domain);
 extern bool has_rolreplication(Oid roleid);
 
-/* in access/transam/xlog.c */
-extern bool BackupInProgress(void);
-extern void CancelBackup(void);
-
 /* in executor/nodeHash.c */
 extern size_t get_hash_memory_limit(void);
 
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