Elasticsearch wildcard 笔记
仍然使用上一篇文章的user.json数据，假如要搜索名字包含jack的人，则最先想到的应该就是wildcard,大概会这么写： 使用chrome的postman构造请求： 1.原始请求 url地址：http://localhost:9200/shellbye/user/_search 请求方法：post 参数（raw）：
{
"query": {
"wildcard": {
"name": "jack"
}
}
}
返回结果：
{
"took": 3,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 2,
"max_score": 1,
"hits": [
{
"_index": "shellbye",
"_type": "user",
"_id": "1",
"_score": 1,
"_source": {
"name": "jack",
"age": 30,
"addr": "Sichuang"
}
},
{
"_index": "shellbye",
"_type": "user",
"_id": "2",
"_score": 1,
"_source": {
"name": "jack jack",
"age": 31,
"addr": "Sichuang"
}
}
]
}
}
你会发现jackson这个应该也是要返回却没有返回，这个感觉不符合我对wildcard的理解哦，是不是呢？要返回所有包含（不仅仅是匹配）jack的user应该怎么做呢？那就是使用通配符“”和“?”。 2.带通配符“”的请求： url地址：http://localhost:9200/shellbye/user/_search 请求方法：post 参数（raw）：
{
"query": {
"wildcard": {
"name": "*jack*"
}
}
}
返回结果：
{
"took": 8,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 4,
"max_score": 1,
"hits": [
{
"_index": "shellbye",
"_type": "user",
"_id": "4",
"_score": 1,
"_source": {
"name": "jackson jackson",
"age": 33,
"addr": "Sichuang"
}
},
{
"_index": "shellbye",
"_type": "user",
"_id": "1",
"_score": 1,
"_source": {
"name": "jack",
"age": 30,
"addr": "Sichuang"
}
},
{
"_index": "shellbye",
"_type": "user",
"_id": "2",
"_score": 1,
"_source": {
"name": "jack jack",
"age": 31,
"addr": "Sichuang"
}
},
{
"_index": "shellbye",
"_type": "user",
"_id": "3",
"_score": 1,
"_source": {
"name": "jackson",
"age": 32,
"addr": "Sichuang"
}
}
]
}
}
这下就所有包含jack的user就都返回了，但是官方文档也说了，不建议在wildcard的开头加通配符。所以如果不是必须要，最好就不要在开头加通配符。 3.带通配符“?”的请求： url地址：http://localhost:9200/shellbye/user/_search 请求方法：post 参数（raw）：
{
"query": {
"wildcard": {
"name": "jac?"
}
}
}
返回结果：
{
"took": 1,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 2,
"max_score": 1,
"hits": [
{
"_index": "shellbye",
"_type": "user",
"_id": "1",
"_score": 1,
"_source": {
"name": "jack",
"age": 30,
"addr": "Sichuang"
}
},
{
"_index": "shellbye",
"_type": "user",
"_id": "2",
"_score": 1,
"_source": {
"name": "jack jack",
"age": 31,
"addr": "Sichuang"
}
}
]
}
}
注：“*”通配任何个（一个或多个）字符，“?”通配一个字符。
参考资料： [1].[http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-wildcard-query.html
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