CODEWITHSUNDEEP
mysql
enchance
enchance

Reputation: 30521

Grant user access to limited number of tables in MySQL

I'm running some tests and I'm trying to see if I can create a user with access to only 1 or 2 tables in my db. Does anyone know how this is done? My code below fails:

GRANT SELECT ON testdb.fruits, testdb.sports TO joe@localhost IDENTIFIED BY 'pass';

The error says I have an error in my syntax.

Upvotes: 48

Views: 110800

Answers (2)

Kip
Kip

Reputation: 109503

You can use the mysql.tables_priv table directly:

INSERT INTO mysql.tables_priv (`Host`, `Db`, `User`, `Table_name`, `Grantor`, `Table_priv`)
VALUES
('%', DATABASE(), 'someuser', 'mytable1', CURRENT_USER, 'Select,Insert,Update,Delete'),
('%', DATABASE(), 'someuser', 'mytable2', CURRENT_USER, 'Select,Insert,Update,Delete')

After a manual update to these tables, you will need to explicitly run FLUSH PRIVILEGES query to tell MySQL to update its permissions cache (not required when using GRANT)

Upvotes: 5

Michael Berkowski
Michael Berkowski

Reputation: 270775

Run them as two individual GRANT statements:

GRANT SELECT ON testdb.fruits TO joe@localhost IDENTIFIED BY 'pass';
GRANT SELECT ON testdb.sports TO joe@localhost IDENTIFIED BY 'pass';

The MySQL GRANT syntax only permits one object in the priv_level position:, though it may use a * as a wildcard:

GRANT
    priv_type [(column_list)]
      [, priv_type [(column_list)]] ...
    ON [object_type] priv_level
    TO user_specification [, user_specification] ...
    [REQUIRE {NONE | ssl_option [[AND] ssl_option] ...}]
    [WITH with_option ...]

object_type:
    TABLE
  | FUNCTION
  | PROCEDURE

priv_level:
    *
  | *.*
  | db_name.*
  | db_name.tbl_name
  | tbl_name
  | db_name.routine_name

The part below does not appear to work on MySQL 5.5. How to "subtract" privileges in MySQL addresses why.

To grant SELECT on all tables then selectively revoke, you could do:

GRANT SELECT ON testdb.* TO joe@localhost IDENTIFIED BY 'pass';
REVOKE ALL PRIVILEGES ON testdb.tblname FROM joe@localhost;

This seems to be an odd method though, and I think I would individually GRANT rather than individually REVOKE.

Upvotes: 78

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