mysql> describe growthexperiments_mentor_mentee;
+------------------+------------------+------+-----+---------+-------+
| Field            | Type             | Null | Key | Default | Extra |
+------------------+------------------+------+-----+---------+-------+
| gemm_mentee_id   | int(10) unsigned | NO   | PRI | NULL    |       |
| gemm_mentor_role | varbinary(255)   | NO   | PRI | NULL    |       |
| gemm_mentor_id   | int(10) unsigned | NO   | MUL | NULL    |       |
+------------------+------------------+------+-----+---------+-------+