lang/java/integration-test/codegen-test/src/test/resources/avro/nested_logical_types_union_fixed.avsc

{"namespace": "org.apache.avro.codegentest.testdata",
  "type": "record",
  "name": "NestedLogicalTypesUnionFixedDecimal",
  "doc" : "Test nested types with logical types in generated Java classes",
  "fields": [
    {
      "name": "unionOfFixedDecimal",
      "type": ["null", {
        "namespace": "org.apache.avro.codegentest.testdata",
        "name": "FixedInUnion",
        "type": "fixed",
        "size": 12,
        "logicalType": "decimal",
        "precision": 28,
        "scale": 15
      }]
    }]
}