Fixes (bug #6932: 'revoke all privileges...' doesn't remove all proper columns from columns_priv

       bug #6933: error in the tests/grant.pl test).


mysql-test/r/grant.result:
  A fix (bug #6932: 'revoke all privileges...' doesn't remove all proper columns from columns_priv).
mysql-test/t/grant.test:
  A fix (bug #6932: 'revoke all privileges...' doesn't remove all proper columns from columns_priv).
sql/sql_acl.cc:
  A fix (bug #6932: 'revoke all privileges...' doesn't remove all proper columns from columns_priv).
  The problem is that we use whole key length (including 'Column_name' keypart)                          
  during scanning the 'columns_priv' table in case of revoke_grant.
tests/grant.pl:
  A fix (bug #6933: error in the tests/grant.pl test).

mysql-test/r/grant.result

@@ -321,3 +321,23 @@ DROP DATABASE testdb7;
 DROP DATABASE testdb8;
 DROP DATABASE testdb9;
 DROP DATABASE testdb10;
+create table t1(a int, b int, c int, d int);
+grant insert(b), insert(c), insert(d), insert(a) on t1 to grant_user@localhost;
+show grants for grant_user@localhost;
+Grants for grant_user@localhost
+GRANT USAGE ON *.* TO 'grant_user'@'localhost'
+GRANT INSERT (a, d, c, b) ON `test`.`t1` TO 'grant_user'@'localhost'
+select Host,Db,User,Table_name,Column_name,Column_priv from mysql.columns_priv;
+Host	Db	User	Table_name	Column_name	Column_priv
+localhost	test	grant_user	t1	c	Insert
+localhost	test	grant_user	t1	b	Insert
+localhost	test	grant_user	t1	a	Insert
+localhost	test	grant_user	t1	d	Insert
+revoke ALL PRIVILEGES on t1 from grant_user@localhost;
+show grants for grant_user@localhost;
+Grants for grant_user@localhost
+GRANT USAGE ON *.* TO 'grant_user'@'localhost'
+select Host,Db,User,Table_name,Column_name,Column_priv from mysql.columns_priv;
+Host	Db	User	Table_name	Column_name	Column_priv
+drop user grant_user@localhost;
+drop table t1;

mysql-test/t/grant.test

@@ -267,3 +267,16 @@ DROP DATABASE testdb8;
 DROP DATABASE testdb9;
 DROP DATABASE testdb10;
 
+#
+# Bug #6932: a problem with 'revoke ALL PRIVILEGES'
+#
+
+create table t1(a int, b int, c int, d int);
+grant insert(b), insert(c), insert(d), insert(a) on t1 to grant_user@localhost;
+show grants for grant_user@localhost;
+select Host,Db,User,Table_name,Column_name,Column_priv from mysql.columns_priv;
+revoke ALL PRIVILEGES on t1 from grant_user@localhost;
+show grants for grant_user@localhost;
+select Host,Db,User,Table_name,Column_name,Column_priv from mysql.columns_priv;
+drop user grant_user@localhost;
+drop table t1;

sql/sql_acl.cc

@@ -2035,7 +2035,7 @@ static int replace_column_table(GRANT_TABLE *g_t,
   {
     table->file->extra(HA_EXTRA_RETRIEVE_ALL_COLS);
     if (table->file->index_read(table->record[0], (byte*) table->field[0]->ptr,
-				table->key_info[0].key_length,
+                                key_length,
 				HA_READ_KEY_EXACT))
       goto end;
 

tests/grant.pl

@@ -74,9 +74,9 @@ safe_query("revoke select(user) on mysql.user from $user");
 
 safe_query("grant select on *.* to $user");
 safe_query("set password FOR ${opt_user}2\@$opt_host = password('test')",1);
-safe_query("set password FOR $opt_user=password('test')");
+safe_query("set password FOR $opt_user\@$opt_host=password('test')");
 user_connect(1);
-safe_query("set password FOR $opt_user=''");
+safe_query("set password FOR $opt_user\@$opt_host=''");
 user_connect(0);
 user_query("select * from mysql.user where user = '$opt_user'");
 user_query("select * from mysql.db where user = '$opt_user'");