Extension:Babel/babel table

babel_user
...

babel_lang
...

babel_level
...

Schema
mysql> describe babel; +-+--+--+-+-+---+ +-+--+--+-+-+---+ +-+--+--+-+-+---+
 * Field      | Type             | Null | Key | Default | Extra |
 * babel_user | int(10) unsigned | NO   | PRI | NULL    |       |
 * babel_lang | varbinary(35)    | NO   | PRI | NULL    |       |
 * babel_level | varbinary(2)    | NO   |     | NULL    |       |

Indexes
+---++--+--+-+---+-+--++--++-+---+ +---++--+--+-+---+-+--++--++-+---+ +---++--+--+-+---+-+--++--++-+---+
 * Table | Non_unique | Key_name        | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |
 * babel |         0 | PRIMARY          |            1 | babel_user  | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
 * babel |         0 | PRIMARY          |            2 | babel_lang  | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
 * babel |         1 | babel_lang_level |            1 | babel_lang  | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
 * babel |         1 | babel_lang_level |            2 | babel_level | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |