// partition rows 20, subs [1, 2, 3, 4, 5, 6]
{ "employee_id":3, "position_id":1, "sub":3, "salary":13 }
{ "employee_id":8, "position_id":1, "sub":4, "salary":14 }
{ "employee_id":15, "position_id":1, "sub":6, "salary":16 }
{ "employee_id":14, "position_id":1, "sub":5, "salary":15 }
{ "employee_id":16, "position_id":1, "sub":6, "salary":16 }
{ "employee_id":9, "position_id":1, "sub":4, "salary":14 }
{ "employee_id":2, "position_id":1, "sub":2, "salary":12 }
{ "employee_id":6, "position_id":1, "sub":4, "salary":14 }
{ "employee_id":12, "position_id":1, "sub":5, "salary":15 }
{ "employee_id":11, "position_id":1, "sub":5, "salary":15 }
{ "employee_id":1, "position_id":1, "sub":2, "salary":12 }
{ "employee_id":7, "position_id":1, "sub":4, "salary":14 }
{ "employee_id":10, "position_id":1, "sub":5, "salary":15 }
{ "employee_id":19, "position_id":1, "sub":6, "salary":16 }
{ "employee_id":18, "position_id":1, "sub":6, "salary":16 }
{ "employee_id":4, "position_id":1, "sub":3, "salary":13 }
{ "employee_id":17, "position_id":1, "sub":6, "salary":16 }
{ "employee_id":5, "position_id":1, "sub":3, "salary":13 }
{ "employee_id":0, "position_id":1, "sub":1, "salary":11 }
{ "employee_id":13, "position_id":1, "sub":5, "salary":15 }