columns {
  name: "Input.key"
  type {
    type_id: STRING
  }
}
columns {
  name: "Input.subkey"
  type {
    type_id: STRING
  }
}
columns {
  name: "Input.value"
  type {
    type_id: STRING
  }
}
columns {
  name: "d.kk"
  type {
    type_id: STRING
  }
}
columns {
  name: "d.sk"
  type {
    type_id: STRING
  }
}
columns {
  name: "d.val"
  type {
    type_id: STRING
  }
}
