Elasticsearch查询去重
Elasticsearch查询去重
实现查询去重、分页
例如：实现依据qid去重，createTime排序
DSL：
GET /nb_luban_answer/_search
{
"query": {
"match": {
"status": 1
}
},
"sort": [
{
"createTime": {
"order": "desc"
}
}
],"aggs": {
"qid": {
"terms": {
"field": "qid",
"size": 10
},"aggs": {
"rated": {
"top_hits": {
"sort": [{
"createTime": {"order": "desc"}
}],
"size": 1
}
}
}
}
},
"size": 0,
"from": 0
}
执行结果
{
"_shards": {
"total": 4,
"failed": 0,
"successful": 4
},
"hits": {
"hits": [],
"total": 4,
"max_score": 0
},
"took": 4,
"timed_out": false,
"aggregations": {
"qid": {
"doc_count_error_upper_bound": 0,
"sum_other_doc_count": 0,
"buckets": [
{
"rated": {
"hits": {
"hits": [
{
"_index": "nb_luban_answer",
"_type": "luban_answer",
"_source": {
"img": "{\r\n \"img1\" : \"11111'>'\",\r\n \"img2\" : \"2222'>'\",\r\n \"img3\" : \"33333'>'\"\r\n}",
"pin": "motai869",
"createTime": "2017-03-09 00:00:00",
"id": "SN-0000001792-9-1",
"tableNameSuffix": "1",
"qid": "SN-0000001536-9-3",
"content": "888'>'",
"status": 1
},
"_id": "SN-0000001792-9-1",
"sort": [
1489017600000
],
"_score": null
}
],
"total": 2,
"max_score": null
}
},
"doc_count": 2,
"key": "SN-0000001536-9-3"
},
{
"rated": {
"hits": {
"hits": [
{
"_index": "nb_luban_answer",
"_type": "luban_answer",
"_source": {
"img": "{\r\n \"img1\" : \"jfs/t3184/361/7557351412/2685/17143f65/58b91982N4e71a5d8.jpg\",\r\n \"img2\" : \"jfs/t3184/361/7557351412/2685/17143f65/58b91982N4e71a5d8.jpg\",\r\n \"img3\" : \"jfs/t3184/361/7557351412/2685/17143f65/58b91982N4e71a5d8.jpg\"\r\n}",
"pin": "motai869",
"createTime": "2017-03-03 00:00:00",
"id": "SN-0000001280-9-3",
"tableNameSuffix": "3",
"qid": "SN-0000000256-0-3",
"content": "hahaha",
"status": 1
},
"_id": "SN-0000001280-9-3",
"sort": [
1488499200000
],
"_score": null
}
],
"total": 1,
"max_score": null
}
},
"doc_count": 1,
"key": "SN-0000000256-0-3"
},
{
"rated": {
"hits": {
"hits": [
{
"_index": "nb_luban_answer",
"_type": "luban_answer",
"_source": {
"pin": "motai869",
"createTime": "2017-03-02 00:00:00",
"id": "SN-0000208128-8-1",
"tableNameSuffix": "1",
"qid": "SN-0000207872-9-3",
"content": "hahaha",
"status": 1
},
"_id": "SN-0000208128-8-1",
"sort": [
1488412800000
],
"_score": null
}
],
"total": 1,
"max_score": null
}
},
"doc_count": 1,
"key": "SN-0000207872-9-3"
}
]
}
}
}
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