Elasticsearch-“星期几”的DateTime映射
我在课堂上有以下财产:
public DateTime InsertedTimeStamp { get; set; }
通过ES中的以下映射
"insertedTimeStamp ":{ "type":"date",
"format":"yyyy-MM-ddTHH:mm:ssZ"
},
我想进行汇总以返回按“星期几”分组的所有数据,即“星期一”,“星期二” …等
我知道我可以在聚合调用中使用“脚本”来执行此操作,但是,据我了解,如果有很多文档,使用脚本不会对性能产生不小的影响。
有没有一种方法可以用“子属性”映射属性。即我可以用一个字符串:
"somestring":{ "type":"string",
"analyzer":"full_word",
"fields":{
"partial":{
"search_analyzer":"full_word",
"analyzer":"partial_word",
"type":"string"
},
"partial_back":{
"search_analyzer":"full_word",
"analyzer":"partial_word_back",
"type":"string"
},
"partial_middle":{
"search_analyzer":"full_word",
"analyzer":"partial_word_name",
"type":"string"
}
}
},
全部具有.net
代码中类的单个属性。
我可以做一些类似的事情来分别存储“完整日期”,然后分别存储“年”,“月”和“天”等(在索引时间存储某种“脚本”),还是我需要在存储中添加更多属性?上课并分别映射它们?这是Transform所做的吗?(现在已贬值,因此似乎表明我需要单独的字段…)
回答:
使用索引pattern_capture
过滤器在索引编制时绝对可以做到这一点。
首先,您需要为每个日期部分定义一个分析器+令牌过滤器组合,并将每个分配给日期字段的子字段。每个令牌过滤器将仅捕获其感兴趣的组。
{ "settings": {
"analysis": {
"analyzer": {
"year_analyzer": {
"type": "custom",
"tokenizer": "keyword",
"filter": [
"year"
]
},
"month_analyzer": {
"type": "custom",
"tokenizer": "keyword",
"filter": [
"month"
]
},
"day_analyzer": {
"type": "custom",
"tokenizer": "keyword",
"filter": [
"day"
]
},
"hour_analyzer": {
"type": "custom",
"tokenizer": "keyword",
"filter": [
"hour"
]
},
"minute_analyzer": {
"type": "custom",
"tokenizer": "keyword",
"filter": [
"minute"
]
},
"second_analyzer": {
"type": "custom",
"tokenizer": "keyword",
"filter": [
"second"
]
}
},
"filter": {
"year": {
"type": "pattern_capture",
"preserve_original": false,
"patterns": [
"(\\d{4})-\\d{2}-\\d{2}[tT]\\d{2}:\\d{2}:\\d{2}[zZ]"
]
},
"month": {
"type": "pattern_capture",
"preserve_original": false,
"patterns": [
"\\d{4}-(\\d{2})-\\d{2}[tT]\\d{2}:\\d{2}:\\d{2}[zZ]"
]
},
"day": {
"type": "pattern_capture",
"preserve_original": false,
"patterns": [
"\\d{4}-\\d{2}-(\\d{2})[tT]\\d{2}:\\d{2}:\\d{2}[zZ]"
]
},
"hour": {
"type": "pattern_capture",
"preserve_original": false,
"patterns": [
"\\d{4}-\\d{2}-\\d{2}[tT](\\d{2}):\\d{2}:\\d{2}[zZ]"
]
},
"minute": {
"type": "pattern_capture",
"preserve_original": false,
"patterns": [
"\\d{4}-\\d{2}-\\d{2}[tT]\\d{2}:(\\d{2}):\\d{2}[zZ]"
]
},
"second": {
"type": "pattern_capture",
"preserve_original": false,
"patterns": [
"\\d{4}-\\d{2}-\\d{2}[tT]\\d{2}:\\d{2}:(\\d{2})[zZ]"
]
}
}
}
},
"mappings": {
"test": {
"properties": {
"date": {
"type": "date",
"format": "yyyy-MM-dd'T'HH:mm:ssZ",
"fields": {
"year": {
"type": "string",
"analyzer": "year_analyzer"
},
"month": {
"type": "string",
"analyzer": "month_analyzer"
},
"day": {
"type": "string",
"analyzer": "day_analyzer"
},
"hour": {
"type": "string",
"analyzer": "hour_analyzer"
},
"minute": {
"type": "string",
"analyzer": "minute_analyzer"
},
"second": {
"type": "string",
"analyzer": "second_analyzer"
}
}
}
}
}
}
}
然后,当您为日期编入索引(例如)时2016-01-22T10:01:23Z
,您将获得每个填充了相关部分的日期子字段,即
date
:2016-01-22T10:01:23Z
date.year
:2016
date.month
:01
date.day
:22
date.hour
:10
date.minute
:01
date.second
:23
然后,您可以随意在任何这些子字段上进行汇总以获得所需的内容。
以上是 Elasticsearch-“星期几”的DateTime映射 的全部内容, 来源链接: utcz.com/qa/403195.html