Remove the fix for Bug#10668 "CREATE USER does not enforce username

length limit", it's superseded by the fix for Bug#16899 "Possible buffer
overflow in handling of DEFINER-clause". Update test results.


mysql-test/r/grant.result:
  A post-merge fix.
mysql-test/t/grant.test:
  A new error is returned, use the default database after drop database.
sql/sql_acl.cc:
  Remove an unneeded check.

mysql-test/r/grant.result

@@ -943,8 +943,9 @@ DROP TABLE mysqltest3.t_nn;
 DROP DATABASE mysqltest3;
 REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'mysqltest_1'@'localhost';
 DROP USER 'mysqltest_1'@'localhost';
+use test;
 create user mysqltest1_thisisreallytoolong;
-ERROR HY000: Operation CREATE USER failed for 'mysqltest1_thisisreallytoolong'@'%'
+ERROR HY000: String 'mysqltest1_thisisreallytoolong' is too long for user name (should be no longer than 16)
 GRANT CREATE ON mysqltest.* TO 1234567890abcdefGHIKL@localhost;
 ERROR HY000: String '1234567890abcdefGHIKL' is too long for user name (should be no longer than 16)
 GRANT CREATE ON mysqltest.* TO some_user_name@1234567890abcdefghij1234567890abcdefghij1234567890abcdefghijQWERTY;

mysql-test/t/grant.test

@@ -805,12 +805,13 @@ DROP DATABASE mysqltest3;
 REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'mysqltest_1'@'localhost';
 DROP USER 'mysqltest_1'@'localhost';
 
-
+# eestore the original database
+use test;
 
 #
 # Bug #10668: CREATE USER does not enforce username length limit
 #
---error ER_CANNOT_USER
+--error ER_WRONG_STRING_LENGTH
 create user mysqltest1_thisisreallytoolong;
 
 #

sql/sql_acl.cc

@@ -5232,14 +5232,6 @@ bool mysql_create_user(THD *thd, List <LEX_USER> &list)
       continue;
     }
 
-    if (user_name->host.length > HOSTNAME_LENGTH ||
-	user_name->user.length > USERNAME_LENGTH)
-    {
-      append_user(&wrong_users, user_name);
-      result= TRUE;
-      continue;
-    }
-
     /*
       Search all in-memory structures and grant tables
       for a mention of the new user name.