How to Use pagination (size and from) in elastic search aggregation?

问题

How to Use pagination (size and from) in elasticsearch aggregation , I used Size and from in agreggition it,s throw exception for exmaple.
I wanna query like?

GET /index/nameorder/_search

{
    "size": 0,
    "query": {
        "filtered": {
            "query": {
                "bool": {
                    "must": [
                        {
                            "match": {
                                "projectId": "10057"
                            }
                        }
                    ]
                }
            },
            "filter": {
                "range": {
                    "purchasedDate": {
                        "from": "2012-02-05T00:00:00",
                        "to": "2015-02-11T23:59:59"
                    }
                }
            }
        }
    },
    "aggs": {
        "group_by_a": {
            "terms": {
                "field": "promocode",
                "size": 40,
                "from": 40
            },
            "aggs": {
                "TotalPrice": {
                    "sum": {
                        "field": "subtotalPrice"
                    }
                }
            }
        }
    }
}

回答1:

As of now , this feature is not supported.

There is a bug on this , but its still in discuss mode.

Issue - https://github.com/elasticsearch/elasticsearch/issues/4915

回答2:

In order to implement pagination on top of aggregation in Elasticsearch, you need to do as follows.

1. Define the size of each batch.

2. Run cardinality count

3. Then according to cardinality define partition = (Cardinality count / size )(this size must be smaller than fetch size)

4. now you can iterate over the partitions using partition filter - Please note size must be big enough cause the results are not equally splitted between the buckets.

来源：https://stackoverflow.com/questions/28456319/how-to-use-pagination-size-and-from-in-elastic-search-aggregation