in "insert into tablename" statement,if the "tablename" contains uppercase characters this statement will overwrite the table

in "insert into tablename" statement,
if the "tablename" contains uppercase characters this statement will overwrite the table.

For Example:
hive> desc dual;
OK
dummy string
Time taken: 1.856 seconds

hive> select * from dual;
OK
dummy
Time taken: 3.133 seconds

drop table if exists tmp_test_1 ;
create EXTERNAL table tmp_test_1 (dummy string) partitioned by (dt string, hr string);
insert into table tmp_test_1 partition (dt='1', hr='1') select * from dual;
insert into table tmp_TEST_1 partition (dt='1', hr='1') select count from dual;
select * from tmp_test_1;

Result :
OK
1 1 1
Time taken: 0.121 seconds