fix alter_table.test: remove old assert as it was removed from 5.6,

add extra_func code from 5.5, that was lost in a merge

mysql-test/r/alter_table.result

@@ -270,8 +270,8 @@ ERROR 42000: Incorrect table name ''
 drop table t1;
 drop table if exists t1, t2;
 Warnings:
-Note	1051	Unknown table 't1'
-Note	1051	Unknown table 't2'
+Note	1051	Unknown table 'test.t1'
+Note	1051	Unknown table 'test.t2'
 create table t1 ( a varchar(10) not null primary key ) engine=myisam;
 create table t2 ( a varchar(10) not null primary key ) engine=merge union=(t1);
 flush tables;
@@ -415,7 +415,7 @@ alter table t1 drop key a;
 drop table t1;
 CREATE TABLE T12207(a int) ENGINE=MYISAM;
 ALTER TABLE T12207 DISCARD TABLESPACE;
-ERROR HY000: Table storage engine for 'T12207' doesn't have this option
+ERROR HY000: Storage engine MyISAM of the table `test`.`T12207` doesn't have this option
 DROP TABLE T12207;
 create table t1 (a text) character set koi8r;
 insert into t1 values (_koi8r'');
@@ -556,7 +556,7 @@ create database mysqltest;
 create table t1 (c1 int);
 alter table t1 rename mysqltest.t1;
 drop table t1;
-ERROR 42S02: Unknown table 't1'
+ERROR 42S02: Unknown table 'test.t1'
 alter table mysqltest.t1 rename t1;
 drop table t1;
 create table t1 (c1 int);

sql/sql_parse.cc

@@ -5875,7 +5875,6 @@ void THD::reset_for_next_command(bool calculate_userstat)
   DBUG_ENTER("mysql_reset_thd_for_next_command");
   DBUG_ASSERT(!thd->spcont); /* not for substatements of routines */
   DBUG_ASSERT(! thd->in_sub_stmt);
-  DBUG_ASSERT(thd->transaction.on);
   thd->free_list= 0;
   thd->select_number= 1;
   /*

sql/sql_table.cc

@@ -7278,11 +7278,14 @@ simple_rename_or_index_change(THD *thd, TABLE_LIST *table_list,
   TABLE *table= table_list->table;
   MDL_ticket *mdl_ticket= table->mdl_ticket;
   int error= 0;
+  enum ha_extra_function extra_func= thd->locked_tables_mode
+                                       ? HA_EXTRA_NOT_USED
+                                       : HA_EXTRA_FORCE_REOPEN;
   DBUG_ENTER("simple_rename_or_index_change");
 
   if (keys_onoff != Alter_info::LEAVE_AS_IS)
   {
-    if (wait_while_table_is_used(thd, table, HA_EXTRA_FORCE_REOPEN))
+    if (wait_while_table_is_used(thd, table, extra_func))
       DBUG_RETURN(true);
 
     // It's now safe to take the table level lock.
@@ -7325,7 +7328,7 @@ simple_rename_or_index_change(THD *thd, TABLE_LIST *table_list,
       simple rename did nothing and therefore we can safely return
       without additional clean-up.
     */
-    if (wait_while_table_is_used(thd, table, HA_EXTRA_FORCE_REOPEN))
+    if (wait_while_table_is_used(thd, table, extra_func))
       DBUG_RETURN(true);
     close_all_tables_for_name(thd, table->s, HA_EXTRA_PREPARE_FOR_RENAME, NULL);