aliases should be compared with my_strcasecmp (BUG#3251)

some db comparison code cleupup
removed compiler warnings


mysql-test/r/lowercase_table.result:
  test for BUG#3251
mysql-test/t/lowercase_table.test:
  test for BUG#3251
sql/item.cc:
  simple strcmp can be used for db name comparison
sql/set_var.h:
  changed initialisation order to satisfy compiler
sql/sql_cache.cc:
  simple strcmp can be used for db name comparison
sql/sql_db.cc:
  better use special cherset for files
sql/sql_parse.cc:
  simple strcmp can be used for db name comparison
  aliases should be compared with my_strcasecmp
sql/sql_select.cc:
  aliases should be compared with my_strcasecmp

1 files changed, 14 insertions, 1 deletions

diff --git a/mysql-test/t/lowercase_table.test b/mysql-test/t/lowercase_table.test
index 42e9cdc9f3d..db46f3d432d 100644
--- a/mysql-test/t/lowercase_table.test
+++ b/mysql-test/t/lowercase_table.test
@@ -3,7 +3,7 @@
 #
 
 --disable_warnings
-drop table if exists t1,t2,t3,t4,T1;
+drop table if exists t1,t2,t3,t4;
 --enable_warnings
 
 create table T1 (id int primary key, Word varchar(40) not null, Index(Word));
@@ -41,3 +41,16 @@ delete P1.*,p2.* from t1 as P1, t2 as P2 where P1.a=p2.a;
 update t1 as p1, t2 as p2 SET p1.a=1,P2.a=1 where p1.a=P2.a;
 update t1 as P1, t2 as P2 SET P1.a=1,p2.a=1 where P1.a=p2.a;
 drop table t1,t2;
+
+#
+# aliases case insensitive
+#
+create table t1 (a int);
+create table t2 (a int);
+-- error 1066
+select * from t1 c, t2 C;
+-- error 1066
+select C.a, c.a from t1 c, t2 C;
+drop table t1, t2;
+
+show tables;