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  1. MariaDB Server
  2. MDEV-7574

Security definer views don't work with CONNECT ODBC tables

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      One possible way to get around the requirement for having the FILE privilege to access ODBC tables with CONNECT would be to have them called indirectly via a security definer view. However, it does not currently work.

      Create a security definer view to access the ODBC table, then create a new user:

      [gmontee@localhost ~]$ mysql -u root tmp
      Reading table information for completion of table and column names
      You can turn off this feature to get a quicker startup with -A
       
      Welcome to the MariaDB monitor.  Commands end with ; or \g.
      Your MariaDB connection id is 16
      Server version: 10.0.15-MariaDB-log MariaDB Server
       
      Copyright (c) 2000, 2014, Oracle, SkySQL Ab and others.
       
      Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
       
      MariaDB [tmp]> SHOW CREATE TABLE datetime_table;
      +----------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
      | Table          | Create Table                                                                                                                                                                                                                                                |
      +----------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
      | datetime_table | CREATE TABLE `datetime_table` (
        `id` int(10) NOT NULL,
        `modifiedon` datetime DEFAULT NULL
      ) ENGINE=CONNECT DEFAULT CHARSET=latin1 CONNECTION='DSN=connect_test_azure;UID=connect_test;PWD=Password1' `TABLE_TYPE`='ODBC' `TABNAME`='dbo.datetime_table' |
      +----------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
      1 row in set (0.00 sec)
       
      MariaDB [tmp]> DROP USER 'connecttest'@'localhost';
      Query OK, 0 rows affected (0.00 sec)
       
      MariaDB [tmp]> CREATE OR REPLACE
          -> DEFINER = CURRENT_USER
          -> SQL SECURITY DEFINER
          -> VIEW datetime_view
          -> AS SELECT * FROM datetime_table;
      Query OK, 0 rows affected (0.00 sec)
       
      MariaDB [tmp]> CREATE USER 'connecttest'@'localhost';
      Query OK, 0 rows affected (0.00 sec)
       
      MariaDB [tmp]> GRANT SELECT ON datetime_view TO 'connecttest'@'localhost';
      Query OK, 0 rows affected (0.00 sec)
       
      MariaDB [tmp]> \q
      Bye

      Now connect with the new user, and try to use the view:

      [gmontee@localhost ~]$ mysql -u connecttest tmp
      Reading table information for completion of table and column names
      You can turn off this feature to get a quicker startup with -A
       
      Welcome to the MariaDB monitor.  Commands end with ; or \g.
      Your MariaDB connection id is 17
      Server version: 10.0.15-MariaDB-log MariaDB Server
       
      Copyright (c) 2000, 2014, Oracle, SkySQL Ab and others.
       
      Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
       
      MariaDB [tmp]> SELECT * FROM datetime_view;
      ERROR 1045 (28000): Access denied for user 'connecttest'@'localhost' (using password: NO)
      MariaDB [tmp]> \q
      Bye

      It didn't work, so give the user privileges on the underlying ODBC table:

      [gmontee@localhost ~]$ mysql -u root tmp
      Reading table information for completion of table and column names
      You can turn off this feature to get a quicker startup with -A
       
      Welcome to the MariaDB monitor.  Commands end with ; or \g.
      Your MariaDB connection id is 18
      Server version: 10.0.15-MariaDB-log MariaDB Server
       
      Copyright (c) 2000, 2014, Oracle, SkySQL Ab and others.
       
      Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
       
      MariaDB [tmp]> GRANT FILE ON *.* TO 'connecttest'@'localhost';
      Query OK, 0 rows affected (0.00 sec)
       
      MariaDB [tmp]> GRANT SELECT ON datetime_table TO 'connecttest'@'localhost';
      Query OK, 0 rows affected (0.00 sec)
       
      MariaDB [tmp]> \q
      Bye

      Now try using the view again:

      [gmontee@localhost ~]$ mysql -u connecttest tmp
      Reading table information for completion of table and column names
      You can turn off this feature to get a quicker startup with -A
       
      Welcome to the MariaDB monitor.  Commands end with ; or \g.
      Your MariaDB connection id is 19
      Server version: 10.0.15-MariaDB-log MariaDB Server
       
      Copyright (c) 2000, 2014, Oracle, SkySQL Ab and others.
       
      Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
       
      MariaDB [tmp]> SELECT * FROM datetime_view;
      +----+---------------------+
      | id | modifiedon          |
      +----+---------------------+
      |  1 | 2014-01-01 00:00:00 |
      |  2 | 2016-01-01 00:00:00 |
      +----+---------------------+
      2 rows in set (0.24 sec)

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              serg Sergei Golubchik
              GeoffMontee Geoff Montee (Inactive)
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                Updated:
                Resolved:

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