MDEV-23638 : DROP TRIGGER in Galera Cluster not replicating

Drop trigger handling was missing from wsrep_can_run_in_toi
in 10.5 for some reason.

mysql-test/suite/galera/r/galera_trigger.result

@@ -32,3 +32,47 @@ id
 200
 DROP TRIGGER tr1;
 DROP TABLE t1;
+connection node_1;
+CREATE TABLE t1(id int not null auto_increment, value int not null, primary key (id)) engine=innodb;
+CREATE TABLE t2(id int not null auto_increment, tbl varchar(64) not null, action varchar(64) not null, primary key (id));
+create trigger log_insert after insert on t1
+for each row begin
+insert into t2(tbl, action) values ('t1', 'INSERT');
+end|
+insert into t1(value) values (1);
+insert into t1(value) values (2);
+connection node_2;
+set session wsrep_sync_wait=15;
+insert into t1(value) values (3);
+insert into t1(value) values (4);
+select * from t2;
+id	tbl	action
+1	t1	INSERT
+3	t1	INSERT
+4	t1	INSERT
+6	t1	INSERT
+connection node_1;
+drop trigger if exists log_insert;
+insert into t1(value) values (5);
+select * from t2;
+id	tbl	action
+1	t1	INSERT
+3	t1	INSERT
+4	t1	INSERT
+6	t1	INSERT
+connection node_2;
+insert into t1(value) values (6);
+select * from t2;
+id	tbl	action
+1	t1	INSERT
+3	t1	INSERT
+4	t1	INSERT
+6	t1	INSERT
+connection node_1;
+select * from t2;
+id	tbl	action
+1	t1	INSERT
+3	t1	INSERT
+4	t1	INSERT
+6	t1	INSERT
+drop table t1, t2;

mysql-test/suite/galera/t/galera_trigger.test

@@ -33,4 +33,40 @@ SELECT * FROM t1;
 
 DROP TRIGGER tr1;
 DROP TABLE t1;
+#
+# MDEV-23638 : DROP TRIGGER in Galera Cluster not replicating
+#
+--connection node_1
+CREATE TABLE t1(id int not null auto_increment, value int not null, primary key (id)) engine=innodb;
+
+CREATE TABLE t2(id int not null auto_increment, tbl varchar(64) not null, action varchar(64) not null, primary key (id));
+
+--delimiter |
+create trigger log_insert after insert on t1
+for each row begin
+    insert into t2(tbl, action) values ('t1', 'INSERT');
+end|
+--delimiter ;
+
+insert into t1(value) values (1);
+insert into t1(value) values (2);
+
+--connection node_2
+set session wsrep_sync_wait=15;
+insert into t1(value) values (3);
+insert into t1(value) values (4);
+select * from t2;
+
+--connection node_1
+drop trigger if exists log_insert;
+insert into t1(value) values (5);
+select * from t2;
+
+--connection node_2
+insert into t1(value) values (6);
+select * from t2;
+
+--connection node_1
+select * from t2;
 
+drop table t1, t2;

sql/wsrep_mysqld.cc

@@ -1927,6 +1927,14 @@ bool wsrep_can_run_in_toi(THD *thd, const char *db, const char *table,
     }
     return true;
     break;
+  case SQLCOM_DROP_TRIGGER:
+    DBUG_ASSERT(table_list);
+    if (thd->find_temporary_table(table_list))
+    {
+      return false;
+    }
+    return true;
+    break;
   case SQLCOM_ALTER_TABLE:
     if (create_info &&
         !wsrep_should_replicate_ddl(thd, create_info->db_type->db_type))