我希望通过hive找到一种方法来获取以下avsc文件内容，并将嵌套模式“rentalrecordtype”外部化，以实现模式重用。

{
    "type": "record",
    "name": "EMPLOYEE",
    "namespace": "",
    "doc": "EMPLOYEE is a person that works here",
    "fields": [
        {
            "name": "RENTALRECORD",
            "type": {
                "type": "record",
                "name": "RENTALRECORDTYPE",
                "namespace": "",
                "doc": "Rental record is a record that is kept on every item rented",
                "fields": [
                    {
                        "name": "due_date",
                        "doc": "The date when item is due",
                        "type": "int"
                    } 
                ]
            }
        },
        {
            "name": "hire_date",
            "doc": "Employee date of hire",
            "type": "int"
        }
    ]
}

这种定义模式的方法工作得很好。我能够发出以下hiveql语句，并且成功地创建了表。

CREATE EXTERNAL TABLE employee
STORED AS AVRO
LOCATION '/user/dtom/store/data/employee'
TBLPROPERTIES ('avro.schema.url'='/user/dtom/store/schema/employee.avsc');

但是，我希望能够引用现有的模式，而不是在多个模式中复制记录定义。例如，将生成两个avsc文件，而不是单个模式文件。i、 e.rentalrecord.avsc和employee.avsc。
租赁记录.avsc

{
    "type": "record",
    "name": "RENTALRECORD",
    "namespace": "",
    "doc": "A record that is kept for every rental",
    "fields": [
        {
            "name": "due_date",
            "doc": "The date on which the rental is due back to the store",
            "type": "int"
        }
    ]
}

员工.avsc

{
    "type": "record",
    "name": "EMPLOYEE",
    "namespace": "",
    "doc": "EMPLOYEE is a person that works for the VIDEO STORE",
    "fields": [
        {
            "name": "rentalrecord",
            "doc": "A rental record is a record on every rental",
            "type": "RENTALRECORD"
        },
        {
            "name": "hire_date",
            "doc": "Employee date of hire",
            "type": "int"
        }
    ]
}

在上面的场景中，我们希望能够将rentalrecord模式定义外部化，并能够在employee.avsc和其他地方重用它。
尝试使用以下两个hiveql语句导入架构时，失败…

CREATE EXTERNAL TABLE rentalrecord
STORED AS AVRO
LOCATION '/user/dtom/store/data/rentalrecord'
TBLPROPERTIES ('avro.schema.url'='/user/dtom/store/schema /rentalrecord.avsc');

CREATE EXTERNAL TABLE employee
STORED AS AVRO
LOCATION '/user/dtom/store/data/employee'
TBLPROPERTIES ('avro.schema.url'='/user/dtom/store/schema/employee.avsc');

rentalrecord.avsc已成功导入，但employee.avsc在第一个字段定义中失败。“rentalrecord”类型的字段。以下错误由配置单元输出…
失败：执行错误，从org.apache.hadoop.hive.ql.exec.ddltask返回代码1。java.lang.runtimeexception:元异常(message:org.apache.hadoop.hive.serde2.serdeexception encountered 确定架构时发生异常。返回信号模式以指示问题：“rentalrecord”不是已定义的名称。“rentalrecord”字段的类型必须是已定义的名称或{“type”：…}表达式。）
我的研究告诉我avro文件确实支持这种形式的模式恢复。所以要么我遗漏了什么，要么这是一个不支持通过Hive。
任何帮助都将不胜感激。