MDEV-26925 - upgrade fails creating trigger in sysschema, if root user does not exist

Fix by removing the trigger. It does not do anything useful anyway.

mysql-test/suite/funcs_1/r/is_triggers.result

@@ -110,16 +110,6 @@ ORDER BY trigger_schema, trigger_name;
 TRIGGER_CATALOG	TRIGGER_SCHEMA	TRIGGER_NAME	EVENT_MANIPULATION	EVENT_OBJECT_CATALOG	EVENT_OBJECT_SCHEMA	EVENT_OBJECT_TABLE	ACTION_ORDER	ACTION_CONDITION	ACTION_STATEMENT	ACTION_ORIENTATION	ACTION_TIMING	ACTION_REFERENCE_OLD_TABLE	ACTION_REFERENCE_NEW_TABLE	ACTION_REFERENCE_OLD_ROW	ACTION_REFERENCE_NEW_ROW	CREATED	SQL_MODE	DEFINER	CHARACTER_SET_CLIENT	COLLATION_CONNECTION	DATABASE_COLLATION
 def	mtr	gs_insert	INSERT	def	mtr	global_suppressions	1	NULL	BEGIN   DECLARE dummy INT;   SELECT "" REGEXP NEW.pattern INTO dummy; END	ROW	BEFORE	NULL	NULL	OLD	NEW	#		root@localhost	latin1	latin1_swedish_ci	latin1_swedish_ci
 def	mtr	ts_insert	INSERT	def	mtr	test_suppressions	1	NULL	BEGIN   DECLARE dummy INT;   SELECT "" REGEXP NEW.pattern INTO dummy; END	ROW	BEFORE	NULL	NULL	OLD	NEW	#		root@localhost	latin1	latin1_swedish_ci	latin1_swedish_ci
-def	sys	sys_config_insert_set_user	INSERT	def	sys	sys_config	1	NULL	BEGIN
-    IF @sys.ignore_sys_config_triggers != true AND NEW.set_by IS NULL THEN
-        SET NEW.set_by = USER();
-    END IF;
-END	ROW	BEFORE	NULL	NULL	OLD	NEW	#		root@localhost	utf8mb3	utf8mb3_general_ci	utf8mb3_general_ci
-def	sys	sys_config_update_set_user	UPDATE	def	sys	sys_config	1	NULL	BEGIN
-    IF @sys.ignore_sys_config_triggers != true AND NEW.set_by IS NULL THEN
-        SET NEW.set_by = USER();
-    END IF;
-END	ROW	BEFORE	NULL	NULL	OLD	NEW	#		root@localhost	utf8mb3	utf8mb3_general_ci	utf8mb3_general_ci
 ##################################################################################
 # Testcase 3.2.18.2 + 3.2.18.3: INFORMATION_SCHEMA.TRIGGERS accessible information
 ##################################################################################

mysql-test/suite/funcs_1/r/is_triggers_embedded.result

@@ -110,16 +110,6 @@ ORDER BY trigger_schema, trigger_name;
 TRIGGER_CATALOG	TRIGGER_SCHEMA	TRIGGER_NAME	EVENT_MANIPULATION	EVENT_OBJECT_CATALOG	EVENT_OBJECT_SCHEMA	EVENT_OBJECT_TABLE	ACTION_ORDER	ACTION_CONDITION	ACTION_STATEMENT	ACTION_ORIENTATION	ACTION_TIMING	ACTION_REFERENCE_OLD_TABLE	ACTION_REFERENCE_NEW_TABLE	ACTION_REFERENCE_OLD_ROW	ACTION_REFERENCE_NEW_ROW	CREATED	SQL_MODE	DEFINER	CHARACTER_SET_CLIENT	COLLATION_CONNECTION	DATABASE_COLLATION
 def	mtr	gs_insert	INSERT	def	mtr	global_suppressions	1	NULL	BEGIN   DECLARE dummy INT;   SELECT "" REGEXP NEW.pattern INTO dummy; END	ROW	BEFORE	NULL	NULL	OLD	NEW	#		root@localhost	latin1	latin1_swedish_ci	latin1_swedish_ci
 def	mtr	ts_insert	INSERT	def	mtr	test_suppressions	1	NULL	BEGIN   DECLARE dummy INT;   SELECT "" REGEXP NEW.pattern INTO dummy; END	ROW	BEFORE	NULL	NULL	OLD	NEW	#		root@localhost	latin1	latin1_swedish_ci	latin1_swedish_ci
-def	sys	sys_config_insert_set_user	INSERT	def	sys	sys_config	1	NULL	BEGIN
-    IF @sys.ignore_sys_config_triggers != true AND NEW.set_by IS NULL THEN
-        SET NEW.set_by = USER();
-    END IF;
-END	ROW	BEFORE	NULL	NULL	OLD	NEW	#		root@localhost	utf8mb3	utf8mb3_general_ci	utf8mb3_general_ci
-def	sys	sys_config_update_set_user	UPDATE	def	sys	sys_config	1	NULL	BEGIN
-    IF @sys.ignore_sys_config_triggers != true AND NEW.set_by IS NULL THEN
-        SET NEW.set_by = USER();
-    END IF;
-END	ROW	BEFORE	NULL	NULL	OLD	NEW	#		root@localhost	utf8mb3	utf8mb3_general_ci	utf8mb3_general_ci
 ##################################################################################
 # Testcase 3.2.18.2 + 3.2.18.3: INFORMATION_SCHEMA.TRIGGERS accessible information
 ##################################################################################

mysql-test/suite/sysschema/r/all_sys_objects_exist.result

@@ -154,8 +154,6 @@ statement_performance_analyzer	PROCEDURE
 table_exists	PROCEDURE
 SELECT TRIGGER_NAME FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_SCHEMA = 'sys' ORDER BY TRIGGER_NAME;
 TRIGGER_NAME
-sys_config_insert_set_user
-sys_config_update_set_user
 SELECT sys_version FROM sys.version;
 sys_version
 1.5.1

scripts/sys_schema/README.md

@@ -12,9 +12,7 @@ There are install files available for 5.6 and 5.7 respectively. To load these, y
 
 ##### Description
 
-Holds configuration options for the sys schema. This is a persistent table (using the `InnoDB` storage engine), with the configuration persisting across upgrades (new options are added with `INSERT IGNORE`). 
-
-The table also has two related triggers, which maintain the user that `INSERTs` or `UPDATEs` the configuration - `sys_config_insert_set_user` and `sys_config_update_set_user` respectively.
+Holds configuration options for the sys schema. This is a persistent table, with the configuration persisting across upgrades (new options are added with `INSERT IGNORE`).
 
 Its structure is as follows:
 

scripts/sys_schema/triggers/sys_config_insert_set_user.sql

@@ -22,14 +22,3 @@
 
 DROP TRIGGER IF EXISTS sys_config_insert_set_user;
 
-DELIMITER $$
-
-CREATE DEFINER='root'@'localhost' TRIGGER sys_config_insert_set_user BEFORE INSERT on sys_config
-    FOR EACH ROW
-BEGIN
-    IF @sys.ignore_sys_config_triggers != true AND NEW.set_by IS NULL THEN
-        SET NEW.set_by = USER();
-    END IF;
-END$$
-
-DELIMITER ;

scripts/sys_schema/triggers/sys_config_update_set_user.sql

@@ -22,15 +22,3 @@
 
 
 DROP TRIGGER IF EXISTS sys_config_update_set_user;
-
-DELIMITER $$
-
-CREATE DEFINER='root'@'localhost' TRIGGER sys_config_update_set_user BEFORE UPDATE on sys_config
-    FOR EACH ROW
-BEGIN
-    IF @sys.ignore_sys_config_triggers != true AND NEW.set_by IS NULL THEN
-        SET NEW.set_by = USER();
-    END IF;
-END$$
-
-DELIMITER ;