在OrientDB上嵌入嵌入类型中的嵌入类型

Question

我是orientdb的新手，我想知道是否可以插入具有三个深度级别的文档，使用嵌入式内部另一个嵌入式，如下面的示例。我正在搜索像我的数据这样的例子但没有成功。 例如：

"p_partkey": 1,
"p_name": "lace spring",
"lineorder": [{
    "lo_revenue": 4282453,
    "lo_orderdate": 19920603,
    "customer": [{
        "c_nation": "JORDAN",
        "c_address": "uZaxFV8o9IGgayUEWtPU1Xmw",
        "c_mktsegment": "BUILDING|"
    }],
    "orderdate": [{
        "d_date": "June 3, 1992",
        "d_datekey": 19920603,
        "d_year": 1992
    }]},{
    "lo_revenue": 46868767,
    "lo_orderdate": 9987983,
    "customer": [{
        "c_nation": "BRAZIL",
        "c_address": "kjbnkjakjh",
        "c_mktsegment": "BUILDING|"
    }],
    "orderdate": [{
        "d_date": "June 6, 1994",
        "d_datekey": 19940606,
        "d_year": 1994
    }]}]

我发现的所有示例仅使用一级嵌入式文档。 我正在使用：

INSERT into part CONTENT {json data}

但它只在lineorder上创建一个嵌入类型。

Answer 1

我创建了3个类（A，B，C）

我使用这些查询：

insert into A content { "embedded_B" : { "@type":"d", "@class":"B", "name" :"myRecord_B", "embedded_C" : { "@type":"d", "@class":"C", "name" :"myRecord_C" }}}

select embedded_B.name as name,embedded_B.type() as type from A

select embedded_B.embedded_C.name as name,embedded_B.embedded_C.type() as type from A

希望它有所帮助。