Elasticsearch 认证模拟题 - 15

一、题目

原索引 task1 的字段 title 字段包含单词 The，查询 the 可以查出 1200 篇文档。重建 task1 索引为 task1_new，重建后的索引， title 字段查询 the 单词，不能匹配到任何文档。

PUT task1
{"mappings": {"properties": {"title": {"type": "text"}}}
}# 灌入数据
POST task1/_bulk
{"index": {}}
{"title": "the name"}
{"index": {}}
{"title": "the sex"}
{"index": {}}
{"title": "The age"}
{"index": {}}
{"title": "height"}# 检查查询结果
GET task1/_search
{"query": {"match": {"title": "the"}}
}

1.1 考点

1. 分词器里面的停用词

1.2 答案

# 新建索引结构，自定义分词器
PUT task1_new
{"settings": {"analysis": {"analyzer": {"my_custom_analyzer": { "char_filter": [],"tokenizer": "standard","filter": ["my_custom_stop_words_filter"]}},"filter": {"my_custom_stop_words_filter": {"type": "stop","ignore_case": true,"stopwords": ["the" ]}}}},"mappings": {"properties": {"title": {"type": "text","analyzer": "my_custom_analyzer"}}}
}# 向新索引灌入数据
POST _reindex
{"source": {"index": "task1"},"dest": {"index": "task1_new"}
}# 检查查询结果
GET task1_new/_search
{"query": {"match": {"title": "The"}}
}

二、题目

索引 kibana_sample_data_flights 包含了大量的航班信息，以此写出满足以下条件的查询语句：

1. 对美国的航班信息按照城市分组，找出平均航班延迟时间最高的城市

{"FlightNum": "XLL6LDF","DestCountry": "ZA","OriginWeather": "Thunder & Lightning","OriginCityName": "Jebel Ali","AvgTicketPrice": 642.5951482867853,"DistanceMiles": 3942.7713488567097,"FlightDelay": false,"DestWeather": "Damaging Wind","Dest": "OR Tambo International Airport","FlightDelayType": "No Delay","OriginCountry": "AE","dayOfWeek": 4,"DistanceKilometers": 6345.275413654453,"timestamp": "2024-05-10T06:09:09","DestLocation": {"lat": "-26.1392","lon": "28.246"},"DestAirportID": "JNB","Carrier": "Logstash Airways","Cancelled": false,"FlightTimeMin": 302.15597207878346,"Origin": "Al Maktoum International Airport","OriginLocation": {"lat": "24.896356","lon": "55.161389"},"DestRegion": "SE-BD","OriginAirportID": "DWC","OriginRegion": "SE-BD","DestCityName": "Johannesburg","FlightTimeHour": 5.035932867979724,"FlightDelayMin": 0
}

2.1 考点

1. Boolean
2. 聚合

2.2 答案

GET kibana_sample_data_flights/_search
{"size": 0, "query": {"bool": {"must": [{"term": {"DestCountry": {"value": "US"}}},{"term": {"FlightDelay": {"value": "true"}}}]}},"aggs": {"DestCityName_bucket": {"terms": { "field": "DestCityName" },"aggs": {"avg_FlightDelayMin": { "avg": { "field": "FlightDelayMin" } }}},"max_monthly_sales": {"max_bucket": {"buckets_path": "DestCityName_bucket>avg_FlightDelayMin" }}}
}