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Add GUC for temporarily disabling event triggers

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In order to troubleshoot misbehaving or buggy event triggers, the
documented advice is to enter single-user mode.  In an attempt to
reduce the number of situations where single-user mode is required
(or even recommended) for non-extraordinary maintenance, this GUC
allows to temporarily suspend event triggers.

This was originally extracted from a larger patchset which aimed
at supporting event triggers on login events.

Reviewed-by: Ted Yu <yuzhihong@gmail.com>
Reviewed-by: Mikhail Gribkov <youzhick@gmail.com>
Reviewed-by: Justin Pryzby <pryzby@telsasoft.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz
Reviewed-by: Robert Haas <robertmhaas@gmail.com>
Discussion: https://postgr.es/m/9140106E-F9BF-4D85-8FC8-F2D3C094A6D9@yesql.se
Discussion: https://postgr.es/m/0d46d29f-4558-3af9-9c85-7774e14a7709@postgrespro.ru
This commit is contained in:
Daniel Gustafsson
2023-09-25 12:41:49 +02:00
parent f19669fed3
commit 7750fefdb2
8 changed files with 98 additions and 10 deletions
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11
src/backend/utils/misc/guc_tables.c
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@ -37,6 +37,7 @@
#include "catalog/namespace.h"
#include "catalog/storage.h"
#include "commands/async.h"
#include "commands/event_trigger.h"
#include "commands/tablespace.h"
#include "commands/trigger.h"
#include "commands/user.h"
@ -2000,6 +2001,16 @@ struct config_bool ConfigureNamesBool[] =
NULL, NULL, NULL
},
{
{"event_triggers", PGC_SUSET, CLIENT_CONN_STATEMENT,
gettext_noop("Enables event triggers."),
gettext_noop("When enabled, event triggers will fire for all applicable statements."),
},
&event_triggers,
true,
NULL, NULL, NULL
},
/* End-of-list marker */
{
{NULL, 0, 0, NULL, NULL}, NULL, false, NULL, NULL, NULL