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Commitff87fab

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Remove duplicated comment block in event_trigger.c
The reasons why event triggers are disabled in standalone mode aredocumented in the code path of ddl_command_start, and other placeschecking if standalone mode is enabled or not mention to refer to thecomment for ddl_command_start, except for table_rewrite that duplicatedthe same explanation.Reported-by: David G. JohnstonDiscussion:https://postgr.es/m/CAKFQuwYqHtXpvr2mBJRwH9f+Y5y1GXw3rhbaAu0Dk2MoNevsmA@mail.gmail.com
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‎src/backend/commands/event_trigger.c

Lines changed: 2 additions & 14 deletions
Original file line numberDiff line numberDiff line change
@@ -833,20 +833,8 @@ EventTriggerTableRewrite(Node *parsetree, Oid tableOid, int reason)
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EventTriggerDatatrigdata;
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/*
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* Event Triggers are completely disabled in standalone mode. There are
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* (at least) two reasons for this:
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*
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* 1. A sufficiently broken event trigger might not only render the
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* database unusable, but prevent disabling itself to fix the situation.
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* In this scenario, restarting in standalone mode provides an escape
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* hatch.
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*
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* 2. BuildEventTriggerCache relies on systable_beginscan_ordered, and
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* therefore will malfunction if pg_event_trigger's indexes are damaged.
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* To allow recovery from a damaged index, we need some operating mode
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* wherein event triggers are disabled. (Or we could implement
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* heapscan-and-sort logic for that case, but having disaster recovery
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* scenarios depend on code that's otherwise untested isn't appetizing.)
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* See EventTriggerDDLCommandStart for a discussion about why event
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* triggers are disabled in single user mode.
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*/
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if (!IsUnderPostmaster)
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return;

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