Test case (bug #7261: Alter table loses temp table with lower_case_table_names=2).

mysql-test/r/lowercase_table2.result

-DROP TABLE IF EXISTS t1,t2,T1,T2,t3,T3;
+DROP TABLE IF EXISTS t1,t2,T1,T2,t3,T3,tT;
 DROP DATABASE IF EXISTS `TEST_$1`;
 DROP DATABASE IF EXISTS `test_$1`;
 CREATE TABLE T1 (a int);
@@ -131,3 +131,13 @@ show tables like 't1%';
 Tables_in_test (t1%)
 t1
 drop table t1;
+create temporary table tT(a int(11), b varchar(8));
+insert into tT values (1, 'abc');
+select * from tT;
+a	b
+1	abc
+alter table tT add index (a);
+select * from tT;
+a	b
+1	abc
+drop table tT;

mysql-test/t/lowercase_table2.test

@@ -10,7 +10,7 @@ show variables like "lower_case_table_names";
 enable_query_log;
 
 --disable_warnings
-DROP TABLE IF EXISTS t1,t2,T1,T2,t3,T3;
+DROP TABLE IF EXISTS t1,t2,T1,T2,t3,T3,tT;
 DROP DATABASE IF EXISTS `TEST_$1`;
 DROP DATABASE IF EXISTS `test_$1`;
 --enable_warnings
@@ -100,3 +100,14 @@ show tables like 'T1%';
 alter table t1 add index (A);
 show tables like 't1%';
 drop table t1;
+
+#
+# Bug #7261: Alter table loses temp table
+#
+
+create temporary table tT(a int(11), b varchar(8));
+insert into tT values (1, 'abc');
+select * from tT;
+alter table tT add index (a);
+select * from tT;
+drop table tT;