我的索引中包含以下文件:
{
"name":"rakesh"
"age":"26"
"email":"[email protected]"
}
{
"name":"sam"
"age":"24"
"email":"[email protected]"
}
{
"name":"joseph"
"age":"26"
"email":"[email protected]"
}
{
"name":"genny"
"age":"24"
"email":"[email protected]"
}
现在,我需要获取所有邮件域的计数。喜欢:
@gmail.com:2,
@hotmail.com:1,
@elastic.com:1
使用 Elasticsearch 聚合。
我可以找到与给定查询匹配的记录。但是我需要每个域的数量。
在此先感谢您的帮助。
最佳答案
通过创建仅包含电子邮件域名的子字段,可以轻松实现此目的。首先使用适当的分析器创建索引:
PUT my_index
{
"settings": {
"index": {
"analysis": {
"analyzer": {
"email_domain_analyzer": {
"type": "pattern",
"pattern": "(.+)@",
"lowercase": true
}
}
}
}
},
"mappings": {
"doc": {
"properties": {
"email": {
"type": "text",
"fields": {
"domain": {
"type": "text",
"fielddata": true,
"analyzer": "email_domain_analyzer"
}
}
}
}
}
}
}
然后创建您的文档:
POST my_index/doc/_bulk
{ "index": {"_id": 1 }}
{ "name":"rakesh", "age":"26", "email":"[email protected]" }
{ "index": {"_id": 2 }}
{ "name":"sam", "age":"24", "email":"[email protected]" }
{ "index": {"_id": 3 }}
{ "name":"joseph", "age":"26", "email":"[email protected]" }
{ "index": {"_id": 4 }}
{ "name":"genny", "age":"24", "email":"[email protected]" }
最后,您可以在
email.domain
字段上进行汇总,然后将确切获得所需的内容:POST my_index/_search
{
"size": 0,
"aggs": {
"domains": {
"terms": {
"field": "email.domain"
}
}
}
}
关于regex - 使用Elasticsearch的邮件域的聚合计数,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/50598368/