我将此数据插入弹性搜索:
[
{ "name": "Cassandra Irwin", "location": "Monzon de Campos" .. },
{ "name": "Gayle Mooney", "location": "Villarroya del Campo" .. },
{ "name": "Angelita Charles", "location": "Revenga de Campos" .. },
{ "name": "Sheppard Sweet", "location": "Santiago del Campo" .. },
..
..
旁注:重现: 1)下载:http://wmo.co/20160928_es_query/bulk.json 2)执行:curl -s -XPOST'http://localhost:9200/testing/external/_bulk?pretty' - data-binary @ bulk.json
问题:获取每个“位置”有多少条记录的计数。
解决方案1:存储桶聚合..未提供所需结果
curl -s -XPOST 'localhost:9200/testing/_search?pretty' -d '
{
"aggs": { "location_count": { "terms": { "field":"location", "size":100 }}}
}' | jq '.aggregations'
结果:
{"location_count":{"doc_count_error_upper_bound":0,"sum_other_doc_count":0,
"buckets":[
{"key":"campo", "doc_count":47},
{"key":"del", "doc_count":47},
{"key":"campos", "doc_count":29},
{"key":"de", "doc_count":29},
{"key":"villarroya","doc_count":15},
{"key":"torre", "doc_count":12},
{"key":"monzon", "doc_count":11},
{"key":"santiago", "doc_count":11},
{"key":"pina", "doc_count":9},
{"key":"revenga", "doc_count":9},
{"key":"uleila", "doc_count":9}
]}}
问题:它将“位置”字段拆分为单词,并返回每个单词的文档计数。
解决方案2:期望的结果,但性能问题。
我可以使用此查询,拉出所有位置并在jq中进行聚合(每个方便的JSON cli工具), 但是当应用于大量数据时,这可能会成为一场性能噩梦:
curl -s -XPOST 'localhost:9200/testing/_search?pretty' -d '
{
"query": { "wildcard": { "location": "*" } }, "size":1000,
"_source": ["location"]
}' | jq '[.hits.hits[] |
{location:._source.location,"count":1}] |
group_by(.location) |
map({ key: .[0].location, value: map(.count)|add })'
结果:
[
{ "key": "Monzon de Campos", "value": 11 },
{ "key": "Pina de Campos", "value": 9 },
{ "key": "Revenga de Campos", "value": 9 },
{ "key": "Santiago del Campo", "value": 11 },
{ "key": "Torre del Campo", "value": 12 },
{ "key": "Uleila del Campo", "value": 9 },
{ "key": "Villarroya del Campo", "value": 15 }
]
这是我想要的确切结果。
问题:如何通过弹性搜索查询获得相同的结果? (即通过弹性搜索处理聚合,而不是通过jq处理)
答案 0 :(得分:1)
您需要在not_analyzed
字段中添加location
子字段。
首先像这样修改你的映射:
curl -XPOST 'http://localhost:9200/testing/_mapping/external' -d '{
"properties": {
"location": {
"type": "string",
"fields": {
"raw": {
"type": "string",
"index": "not_analyzed"
}
}
}
}
}'
然后再次重新索引数据:
curl -s -XPOST 'http://localhost:9200/testing/external/_bulk?pretty' --data-binary @bulk.json
最后,您可以像这样(在location.raw
字段上)运行您的查询并获得您期望的结果:
curl -s -XPOST 'localhost:9200/testing/_search?pretty' -d '
{
"aggs": { "location_count": { "terms": { "field":"location.raw", "size":100 }}}
}' | jq '.aggregations'