MDEV-33889 Read only server throws error when running a create temporary table as select statement

create_partitioning_metadata() should only mark transaction r/w
if it actually did anything (that is, the table is partitioned).

otherwise it's a no-op, called even for temporary tables and
it shouldn't do anything at all

mysql-test/main/read_only_innodb.result

@@ -70,7 +70,7 @@ UNLOCK TABLES;
 DROP TABLE t1;
 DROP USER test@localhost;
 disconnect con1;
-echo End of 5.1 tests 
+# End of 5.1 tests
 #
 # Bug#33669: Transactional temporary tables do not work under --read-only
 #
@@ -244,3 +244,26 @@ connection default;
 SET GLOBAL READ_ONLY = OFF;
 DROP USER bug33669@localhost;
 DROP DATABASE db1;
+# End of 5.5 tests
+#
+# MDEV-33889 Read only server throws error when running a create temporary table as select statement
+#
+create table t1(a int) engine=innodb;
+create user u1@localhost;
+grant insert, select, update, delete, create temporary tables on test.* to u1@localhost;
+insert into t1 values (1);
+set global read_only=1;
+connect u1,localhost,u1;
+set default_tmp_storage_engine=innodb;
+create temporary table tt1 (a int);
+create temporary table tt2 like t1;
+create temporary table tt3 as select * from t1;
+select * from tt3;
+a
+1
+disconnect u1;
+connection default;
+drop table t1;
+drop user u1@localhost;
+set global read_only=0;
+# End of 10.5 tests

mysql-test/main/read_only_innodb.test

@@ -103,7 +103,7 @@ DROP USER test@localhost;
 
 disconnect con1;
 
---echo echo End of 5.1 tests 
+--echo # End of 5.1 tests
 
 --echo #
 --echo # Bug#33669: Transactional temporary tables do not work under --read-only
@@ -250,3 +250,29 @@ SET GLOBAL READ_ONLY = OFF;
 DROP USER bug33669@localhost;
 DROP DATABASE db1;
 
+--echo # End of 5.5 tests
+
+--echo #
+--echo # MDEV-33889 Read only server throws error when running a create temporary table as select statement
+--echo #
+create table t1(a int) engine=innodb;
+create user u1@localhost;
+grant insert, select, update, delete, create temporary tables on test.* to u1@localhost;
+insert into t1 values (1);
+set global read_only=1;
+
+connect u1,localhost,u1;
+set default_tmp_storage_engine=innodb;
+
+create temporary table tt1 (a int);
+create temporary table tt2 like t1;
+create temporary table tt3 as select * from t1;
+select * from tt3;
+disconnect u1;
+
+connection default;
+drop table t1;
+drop user u1@localhost;
+set global read_only=0;
+
+--echo # End of 10.5 tests

mysql-test/suite/galera/r/MDEV-27806.result

@@ -37,7 +37,7 @@ mysqld-bin.000002	#	Gtid	#	#	BEGIN GTID #-#-#
 mysqld-bin.000002	#	Query	#	#	use `test`; CREATE TABLE `ts1` (
   `f1` int(11) NOT NULL
 )
-mysqld-bin.000002	#	Xid	#	#	COMMIT /* XID */
+mysqld-bin.000002	#	Query	#	#	COMMIT
 connection node_2;
 include/show_binlog_events.inc
 Log_name	Pos	Event_type	Server_id	End_log_pos	Info

sql/ha_partition.cc

@@ -690,6 +690,7 @@ int ha_partition::create_partitioning_metadata(const char *path,
   partition_element *part;
   DBUG_ENTER("ha_partition::create_partitioning_metadata");
 
+  mark_trx_read_write();
   /*
     We need to update total number of parts since we might write the handler
     file as part of a partition management command

sql/handler.cc

@@ -5251,8 +5251,6 @@ handler::ha_create_partitioning_metadata(const char *name,
   DBUG_ASSERT(m_lock_type == F_UNLCK ||
               (!old_name && strcmp(name, table_share->path.str)));
 
-
-  mark_trx_read_write();
   return create_partitioning_metadata(name, old_name, action_flag);
 }