Hi all,

When pg_event_trigger_dropped_objects is run in a context that is not
the one of an event trigger, currently the error code
ERRCODE_FEATURE_NOT_SUPPORTED is returned. Wouldn't it be better to
have an error to define an out-of-context instead? It seems that it
would be a good thing to have more error verbosity for situations like
the case above. Note that this idea has been mentioned on this ML a
couple of weeks back. In any case, attached is a patch showing the
idea.

Opinions? Is that worth having?
Regards,
-- 
Michael
diff --git a/src/backend/commands/event_trigger.c b/src/backend/commands/event_trigger.c
index 6a3002f..154bed9 100644
--- a/src/backend/commands/event_trigger.c
+++ b/src/backend/commands/event_trigger.c
@@ -1218,7 +1218,7 @@ pg_event_trigger_dropped_objects(PG_FUNCTION_ARGS)
 	if (!currentEventTriggerState ||
 		!currentEventTriggerState->in_sql_drop)
 		ereport(ERROR,
-				(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+				(errcode(ERRCODE_CONTEXT_NOT_SUPPORTED),
 		 errmsg("%s can only be called in a sql_drop event trigger function",
 				"pg_event_trigger_dropped_objects()")));
 
diff --git a/src/backend/utils/errcodes.txt b/src/backend/utils/errcodes.txt
index 62ba092..dcd8489 100644
--- a/src/backend/utils/errcodes.txt
+++ b/src/backend/utils/errcodes.txt
@@ -114,6 +114,7 @@ Section: Class 09 - Triggered Action Exception
 Section: Class 0A - Feature Not Supported
 
 0A000    E    ERRCODE_FEATURE_NOT_SUPPORTED                                  feature_not_supported
+0A001    E    ERRCODE_CONTEXT_NOT_SUPPORTED                                  context_not_supported
 
 Section: Class 0B - Invalid Transaction Initiation
 
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