【ElasticSearch(六)进阶】match匹配,match_phrase 短语匹配
【ElasticSearch(六)进阶】match匹配,match_phrase 短语匹配
一、match进行 基本类型(非字符串)精确匹配
查询 account_number 是 20 的所有结果:
GET /bank/_search
{
"query": {
"match": {
"account_number": 20
}
}
}
返回内容:
此时max_score为1.0,该条记录的_score就是1.0,这是精确匹配。
{
"took" : 1,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : 1.0,
"hits" : [
{
"_index" : "bank",
"_type" : "account",
"_id" : "20",
"_score" : 1.0,
"_source" : {
"account_number" : 20,
"balance" : 16418,
"firstname" : "Elinor",
"lastname" : "Ratliff",
"age" : 36,
"gender" : "M",
"address" : "282 Kings Place",
"employer" : "Scentric",
"email" : "elinorratliff@scentric.com",
"city" : "Ribera",
"state" : "WA"
}
}
]
}
}
二、match进行 字符串模糊匹配查询(全文检索)
查询所有 address 中包含 Kings 的数据:
GET bank/_search
{
"query": {
"match": {
"address": "Kings"
}
}
}
返回结果:
可以看到"address" : "282 Kings Place"
和"address" : "305 Kings Hwy"
两条记录都返回了
{
"took" : 6,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 2,
"relation" : "eq"
},
"max_score" : 5.990829,
"hits" : [
{
"_index" : "bank",
"_type" : "account",
"_id" : "20",
"_score" : 5.990829,
"_source" : {
"account_number" : 20,
"balance" : 16418,
"firstname" : "Elinor",
"lastname" : "Ratliff",
"age" : 36,
"gender" : "M",
"address" : "282 Kings Place",
"employer" : "Scentric",
"email" : "elinorratliff@scentric.com",
"city" : "Ribera",
"state" : "WA"
}
},
{
"_index" : "bank",
"_type" : "account",
"_id" : "722",
"_score" : 5.990829,
"_source" : {
"account_number" : 722,
"balance" : 27256,
"firstname" : "Roberts",
"lastname" : "Beasley",
"age" : 34,
"gender" : "F",
"address" : "305 Kings Hwy",
"employer" : "Quintity",
"email" : "robertsbeasley@quintity.com",
"city" : "Hayden",
"state" : "PA"
}
}
]
}
}
*全文检索就是利用了 倒排索引表,会按照评分进行排序。
三、match_phrase 短语匹配
默认的match搜索会对搜索内容进行分词,比如:mill lane 会分成 mill 和 lane 之后搜索的结果可能包含仅有其中一项的结果,但是此类结果分数较低。
如果不希望被分词而是直接查询短语,可以使用 match_phrase 进行搜索
例子:
查询 地址包含 mill lane 的数据:
GET /bank/_search
{
"query": {
"match_phrase": {
"address": "mill lane"
}
}
}
返回结果:
{
"took" : 18,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : 9.507477,
"hits" : [
{
"_index" : "bank",
"_type" : "account",
"_id" : "136",
"_score" : 9.507477,
"_source" : {
"account_number" : 136,
"balance" : 45801,
"firstname" : "Winnie",
"lastname" : "Holland",
"age" : 38,
"gender" : "M",
"address" : "198 Mill Lane",
"employer" : "Neteria",
"email" : "winnieholland@neteria.com",
"city" : "Urie",
"state" : "IL"
}
}
]
}
}