{"type": "record",
"namespace": "org.apache.impala",
"name": "nested",
"fields": [
  {"name": "t_long", "type": "long"},
  {"name": "t_struct", "type":
    {"name": "r1", "type": "record", "fields": [
      {"name": "f_int", "type": "int"},
      {"name": "t_struct", "type":
        {"name": "r2", "type": "record", "fields": [
          {"name": "f_int", "type": "int"},
          {"name": "f_int2", "type": ["int", "null"]}
        ]}
      },
      {"name": "int_arr", "type": {"type": "array", "items": "int"}},
      {"name": "int_map", "type": {"type": "map", "values": "int"}}
    ]}
  },
  {"name": "t_array_basic", "type": {"type": "array", "items": "int"}},
  {"name": "t_array_struct", "type": {
    "type": "array", "items": {
      "name": "f_struct", "type": "record", "fields": [
        {"name": "f_int1", "type": "int"},
        {"name": "f_int2", "type": "int"},
        {"name": "f_int3", "type": ["int", "null"]}
      ]
    }
  }},
  {"name": "t_array_array", "type": {"type": "array", "items": {
    "type": "array", "items": "int"
  }}},
  {"name": "t_array_map", "type": {"type": "array", "items": {
    "type": "map", "values": "int"
  }}},
  {"name": "map_int", "type": {"type": "map", "values": "int"}},
  {"name": "map_struct", "type": {"type": "map", "values": {
    "name": "r3", "type": "record", "fields": [
      {"name": "f_int", "type": "int"},
      {"name": "f_int2", "type": "int"}
    ]
  }}},
  {"name": "map_array", "type": {"type": "map", "values": {
    "type": "array", "items": ["int", "null"]
  }}},
  {"name": "map_map", "type": {"type": "map", "values": {
    "type": "map", "values": ["int", "null"]
  }}}
]}