[英]Elastic search Average time difference Aggregate Query
我在 elasticsearch 中有文檔,其中每個文檔如下所示:
{
"id": "T12890ADSA12",
"status": "ENDED",
"type": "SAMPLE",
"updatedAt": "2020-05-29T18:18:08.483Z",
"events": [
{
"event": "STARTED",
"version": 1,
"timestamp": "2020-04-30T13:41:25.862Z"
},
{
"event": "INPROGRESS",
"version": 2,
"timestamp": "2020-05-14T17:03:09.137Z"
},
{
"event": "INPROGRESS",
"version": 3,
"timestamp": "2020-05-17T17:03:09.137Z"
},
{
"event": "ENDED",
"version": 4,
"timestamp": "2020-05-29T18:18:08.483Z"
}
],
"createdAt": "2020-04-30T13:41:25.862Z"
}
現在,我想在 elasticsearch 中編寫一個查詢來獲取所有類型為“SAMPLE”的文檔,並且我可以獲得所有這些文檔的 STARTED 和 ENDED 之間的平均時間。 例如。 (2020-05-29T18:18:08.483Z - 2020-04-30T13:41:25.862Z, ....) 的平均值。 假設 STARTED 和 ENDED 事件在 events 數組中只出現一次。 有什么辦法可以做到嗎?
你可以做這樣的事情。 該查詢選擇 SAMPLE 類型和狀態為 ENDED 的事件(以確保存在 ENDED 事件)。 然后avg
聚合使用腳本收集 STARTED 和 ENDED 時間戳並減去它們以返回天數:
POST test/_search
{
"query": {
"bool": {
"filter": [
{
"term": {
"status.keyword": "ENDED"
}
},
{
"term": {
"type.keyword": "SAMPLE"
}
}
]
}
},
"aggs": {
"duration": {
"avg": {
"script": "Map findEvent(List events, String type) {return events.find(it -> it.event == type);} def started = Instant.parse(findEvent(params._source.events, 'STARTED').timestamp); def ended = Instant.parse(findEvent(params._source.events, 'ENDED').timestamp); return ChronoUnit.DAYS.between(started, ended);"
}
}
}
}
腳本如下所示:
Map findEvent(List events, String type) {
return events.find(it -> it.event == type);
}
def started = Instant.parse(findEvent(params._source.events, 'STARTED').timestamp);
def ended = Instant.parse(findEvent(params._source.events, 'ENDED').timestamp);
return ChronoUnit.DAYS.between(started, ended);
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