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我有一个单一类型的索引，我想对它运行一些聚合查询;映射在这里：Elasticsearch对聚合查询返回空值
{
"settings": {
"index": {
"number_of_shards": 1,
"number_of_replicas": 2
}
},
"mappings": {
"v1": {
"_all": {"enabled": false},
"properties": {
"@timestamp": {
"type": "date",
"format": "strict_date_optional_time||epoch_millis",
"index": true
},
"processingTime": {"type": "long", "index": false},
"batchSize": {"type": "long", "index": false},
"general": {
"type": "nested",
"properties": {
"total": {"type": "long"},
"migrated": {"type": "long"},
"joined": {"type": "long"},
"registered": {"type": "long"}
}
},
"scoped": {
"type": "nested",
"properties": {
"since": {"type": "long"},
"loggedIn": {"type": "long"},
"joined": {"type": "long"},
"registered": {"type": "long"}
}
}
}
}
}
}
让我们看看我的查询;一个简单的日期直方图查询按分钟来收集基本数据：
{
"size": 0,
"aggs": {
"x": {
"date_histogram":{
"field": "@timestamp",
"interval": "minute"
},
"aggs": {
"stat-x": { "stats": {"field": "general.registered"}}
}
}
}
}
但是当我运行我的查询（上面的），我得到空值的汇总统计数据，我不明白为什么!:
{
"_shards": {
"failed": 0,
"successful": 1,
"total": 1
},
"aggregations": {
"general": {
"doc_count": 2,
"max-x": {
"avg": null,
"count": 0,
"max": null,
"min": null,
"sum": null
}
}
},
"hits": {
"hits": [],
"max_score": 0.0,
"total": 2
},
"timed_out": false,
"took": 18
}
我不知道为什么它不工作！映射，类型和查询似乎是正确的！谁能帮我！