连续间隔内的Elasticsearch聚合

Question

我有这样的文件：

[
    {
        "code": "code1",
        "dateFrom": "T1",
        "dateTo": "T2",
        "attr1": "valA1",
        "attr2": "valA2"
    }, {
        "code": "code1",
        "dateFrom": "T2",
        "dateTo": "T3",
        "attr1": "valA1",
        "attr2": "valA2"
    }, {
        "code": "code1",
        "dateFrom": "T3",
        "dateTo": "T4",
        "attr1": "valA1",
        "attr2": "valA2"
    }, {
        "code": "code1",
        "dateFrom": "T7",
        "dateTo": "T8",
        "attr1": "valA1",
        "attr2": "valA2"
    }
]

现在，我想在代码dateFrom，dateTo，attr1，attr2上创建术语聚合，但要考虑到日期间隔<dateFrom, dateTo)。如果间隔是连续的，则它们应该属于同一存储桶，但范围要扩大。如果可能，创建像这样的汇总结果的最佳方法是什么：

    {
        "code": "code1",
        "dateFrom": "T1",
        "dateTo": "T4",
        "attr1": "valA1",
        "attr2": "valA2"
    }, {
        "code": "code1",
        "dateFrom": "T7",
        "dateTo": "T8",
        "attr1": "valA1",
        "attr2": "valA2"
    }

谢谢。