[ 'name' => 'dso_id', //column name to be used 'type' => 'VARCHAR(16)', //column type 'index' => 'BTREE', //whether/how to index 'unique' => true, //whether column should be unique 'primary' => true, //whether column should be the primary key ], 'test.a' => [ 'name' => 'test_a_2', 'type' => 'VARCHAR(100)', 'index' => 'BTREE', ] , 'test.c' => [ 'name' => 'test_c', 'type' => 'VARCHAR(100)', 'index' => 'BTREE', ], ]; }