【1】創建es7? 索引

put localhost:9200/pdi_cust ， 注意 PUB_CUST_LABEL 字段分詞了。 es7 不支持type ，所以 無需指定type。

{ "mappings" :{ "properties":{"RCRD_ID":{"type":"keyword"}, "BUSI_CODE":{"type":"keyword"}, "STATE":{"type":"keyword"}, "LOANS":{"type":"nested", "properties" :{"LOAN_NUM":{"type":"keyword"}, "PUB_CUST_LABEL":{"type":"text"}, "DATA_SRC":{"type":"keyword"}, "CUST_NUM": {"type":"keyword"}, "LOAN_BAL_SUM":{"type":"double"}, "OVD_MONEY_SUM": {"type": "double"}}}}} }

【2】插入索引文檔：? post localhost:9200/pdi_cust/_doc/tr_rd_01

{ "RCRD_ID":"tr_rd_01", "STATE":"PDOS" , "BUSI_CODE":"pdi", "LOANS":[{"CUST_NUM":"CUST_NUM_01", "DATA_SRC":"VALD", "LOAN_BAL_SUM":"1111", "LOAN_NUM":"LOAN_NUM_01", "OVD_MONEY_SUM":"1111", "PUB_CUST_LABEL":"張三 李四 王五"}] }

【3】查詢索引所有文檔

post localhost:9200/pdi_cust/_search

{}

// 查詢es所有文檔 {"took": 4,"timed_out": false,"_shards": {"total": 1,"successful": 1,"skipped": 0,"failed": 0},"hits": {"total": {"value": 3,"relation": "eq"},"max_score": 1.0,"hits": [{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_01","_score": 1.0,"_source": {"RCRD_ID": "tr_rd_01","STATE": "PDOS","BUSI_CODE": "pdi","LOANS": [{"CUST_NUM": "CUST_NUM_01","DATA_SRC": "VALD","LOAN_BAL_SUM": "1111","LOAN_NUM": "LOAN_NUM_01","OVD_MONEY_SUM": "1111","PUB_CUST_LABEL": "張三 李四 王五"},{"CUST_NUM": "CUST_NUM_01","DATA_SRC": "VALD","LOAN_BAL_SUM": "2222","LOAN_NUM": "LOAN_NUM_02","OVD_MONEY_SUM": "2222","PUB_CUST_LABEL": "張三2 李四2 王五2"}]}},{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_02","_score": 1.0,"_source": {"RCRD_ID": "tr_rd_02","STATE": "PDOS","BUSI_CODE": "pdi","LOANS": [{"CUST_NUM": "CUST_NUM_02","DATA_SRC": "VALD","LOAN_BAL_SUM": "1113","LOAN_NUM": "LOAN_NUM_3","OVD_MONEY_SUM": "1113","PUB_CUST_LABEL": "李四"},{"CUST_NUM": "CUST_NUM_02","DATA_SRC": "VALD","LOAN_BAL_SUM": "1114","LOAN_NUM": "LOAN_NUM_4","OVD_MONEY_SUM": "1114","PUB_CUST_LABEL": "張三"}]}},{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_03","_score": 1.0,"_source": {"RCRD_ID": "tr_rd_03","STATE": "PDOS","BUSI_CODE": "pdi","LOANS": [{"CUST_NUM": "CUST_NUM_03","DATA_SRC": "VALD","LOAN_BAL_SUM": "1115","LOAN_NUM": "LOAN_NUM_5","OVD_MONEY_SUM": "1115","PUB_CUST_LABEL": "李四 王五"},{"CUST_NUM": "CUST_NUM_03","DATA_SRC": "VALD","LOAN_BAL_SUM": "1116","LOAN_NUM": "LOAN_NUM_6","OVD_MONEY_SUM": "1116","PUB_CUST_LABEL": "張三"}]}}]} }

【4】根據嵌套類型查詢 （filter 與 must 是屬于同一個級別的查詢方式，都可以作為 query->bool 的屬性）

【3】根據嵌套類型查詢? （filter 與 must 是屬于同一個級別的查詢方式，都可以作為 query->bool? 的屬性）
3.1、filter： 不計算評分， 查詢效率高；有緩存； ?（推薦）
?? ?+ term： 精確匹配；
?? ?+ match： 模糊匹配， 倒排索引；
3.2、must： 要計算評分，查詢效率低；無緩存；
?? ?+term： 精確匹配 ， 要評分；
?? ?+match：模糊匹配， 要評分；

【荔枝】

1、使用 filter+term實現精確匹配不計分查詢；

// dsl {"_source":["RCRD_ID", "STATE", "BUSI_CODE"], "query":{"bool":{"filter":[{"term":{"STATE":"PDOS"} } , {"nested":{"path":"LOANS", "query":{"bool":{"filter":[{"term": {"LOANS.LOAN_NUM": "LOAN_NUM_01"}}] }}, "inner_hits": { }} }]} } } // 查詢結果 {"took": 8,"timed_out": false,"_shards": {"total": 1,"successful": 1,"skipped": 0,"failed": 0},"hits": {"total": {"value": 1,"relation": "eq"},"max_score": 0.0,"hits": [{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_01","_score": 0.0,"_source": {"RCRD_ID": "tr_rd_01","STATE": "PDOS","BUSI_CODE": "pdi"},"inner_hits": {"LOANS": {"hits": {"total": {"value": 1,"relation": "eq"},"max_score": 0.0,"hits": [{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_01","_nested": {"field": "LOANS","offset": 0},"_score": 0.0,"_source": {"CUST_NUM": "CUST_NUM_01","DATA_SRC": "VALD","LOAN_BAL_SUM": "1111","LOAN_NUM": "LOAN_NUM_01","OVD_MONEY_SUM": "1111","PUB_CUST_LABEL": "張三 李四 王五"}}]}}}}]} }

score 為0則表示沒有計算得分；

2、使用filter+match 使用不計算得分，但模糊匹配；

// dsl {"_source":["RCRD_ID", "STATE", "BUSI_CODE"], "query":{"bool":{"filter":[{"match":{"STATE":"PDOS"} } , {"nested":{"path":"LOANS", "query":{"bool":{"filter":[{"match": {"LOANS.PUB_CUST_LABEL": "張三 李四"}}] }}, "inner_hits": { }} }]} } } // 結果 {"took": 35,"timed_out": false,"_shards": {"total": 1,"successful": 1,"skipped": 0,"failed": 0},"hits": {"total": {"value": 3,"relation": "eq"},"max_score": 0.0,"hits": [{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_01","_score": 0.0,"_source": {"RCRD_ID": "tr_rd_01","STATE": "PDOS","BUSI_CODE": "pdi"},"inner_hits": {"LOANS": {"hits": {"total": {"value": 2,"relation": "eq"},"max_score": 0.0,"hits": [{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_01","_nested": {"field": "LOANS","offset": 0},"_score": 0.0,"_source": {"CUST_NUM": "CUST_NUM_01","DATA_SRC": "VALD","LOAN_BAL_SUM": "1111","LOAN_NUM": "LOAN_NUM_01","OVD_MONEY_SUM": "1111","PUB_CUST_LABEL": "張三 李四 王五"}},{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_01","_nested": {"field": "LOANS","offset": 1},"_score": 0.0,"_source": {"CUST_NUM": "CUST_NUM_01","DATA_SRC": "VALD","LOAN_BAL_SUM": "2222","LOAN_NUM": "LOAN_NUM_02","OVD_MONEY_SUM": "2222","PUB_CUST_LABEL": "張三2 李四2 王五2"}}]}}}},{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_02","_score": 0.0,"_source": {"RCRD_ID": "tr_rd_02","STATE": "PDOS","BUSI_CODE": "pdi"},"inner_hits": {"LOANS": {"hits": {"total": {"value": 2,"relation": "eq"},"max_score": 0.0,"hits": [{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_02","_nested": {"field": "LOANS","offset": 0},"_score": 0.0,"_source": {"CUST_NUM": "CUST_NUM_02","DATA_SRC": "VALD","LOAN_BAL_SUM": "1113","LOAN_NUM": "LOAN_NUM_3","OVD_MONEY_SUM": "1113","PUB_CUST_LABEL": "李四"}},{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_02","_nested": {"field": "LOANS","offset": 1},"_score": 0.0,"_source": {"CUST_NUM": "CUST_NUM_02","DATA_SRC": "VALD","LOAN_BAL_SUM": "1114","LOAN_NUM": "LOAN_NUM_4","OVD_MONEY_SUM": "1114","PUB_CUST_LABEL": "張三"}}]}}}},{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_03","_score": 0.0,"_source": {"RCRD_ID": "tr_rd_03","STATE": "PDOS","BUSI_CODE": "pdi"},"inner_hits": {"LOANS": {"hits": {"total": {"value": 2,"relation": "eq"},"max_score": 0.0,"hits": [{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_03","_nested": {"field": "LOANS","offset": 0},"_score": 0.0,"_source": {"CUST_NUM": "CUST_NUM_03","DATA_SRC": "VALD","LOAN_BAL_SUM": "1115","LOAN_NUM": "LOAN_NUM_5","OVD_MONEY_SUM": "1115","PUB_CUST_LABEL": "李四 王五"}},{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_03","_nested": {"field": "LOANS","offset": 1},"_score": 0.0,"_source": {"CUST_NUM": "CUST_NUM_03","DATA_SRC": "VALD","LOAN_BAL_SUM": "1116","LOAN_NUM": "LOAN_NUM_6","OVD_MONEY_SUM": "1116","PUB_CUST_LABEL": "張三"}}]}}}}]} }

以上dsl，把 match 換位 term， 查詢不到任何結果，因為 PUB_CUST_LABEL 是 text 類型，分詞了，term是精確匹配；

?

3、使用 must+term， 實現計算得分并精確匹配（查詢效率低于 filter+term），因為 must要計算匹配得分

// dsl {"_source":["RCRD_ID", "STATE", "BUSI_CODE"], "query":{"bool":{"must":[{"term":{"STATE":"PDOS"} } , {"nested":{"path":"LOANS", "query":{"bool":{"must":[{"term": {"LOANS.LOAN_NUM": "LOAN_NUM_01"}}] }}, "inner_hits": { }} }]} } } // 結果 {"took": 13,"timed_out": false,"_shards": {"total": 1,"successful": 1,"skipped": 0,"failed": 0},"hits": {"total": {"value": 1,"relation": "eq"},"max_score": 1.6739764,"hits": [{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_01","_score": 1.6739764,"_source": {"RCRD_ID": "tr_rd_01","STATE": "PDOS","BUSI_CODE": "pdi"},"inner_hits": {"LOANS": {"hits": {"total": {"value": 1,"relation": "eq"},"max_score": 1.5404451,"hits": [{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_01","_nested": {"field": "LOANS","offset": 0},"_score": 1.5404451,"_source": {"CUST_NUM": "CUST_NUM_01","DATA_SRC": "VALD","LOAN_BAL_SUM": "1111","LOAN_NUM": "LOAN_NUM_01","OVD_MONEY_SUM": "1111","PUB_CUST_LABEL": "張三 李四 王五"}}]}}}}]} }

4、使用must+match實現計算得分且走倒排索引查詢或模糊查詢

// dsl {"_source":["RCRD_ID", "STATE", "BUSI_CODE"], "query":{"bool":{"must":[{"match":{"STATE":"PDOS"} } , {"nested":{"path":"LOANS", "query":{"bool":{"must":[{"match": {"LOANS.LOAN_NUM": "LOAN_NUM_01"}}] }}, "inner_hits": { }} }]} } } //結果 {"took": 10,"timed_out": false,"_shards": {"total": 1,"successful": 1,"skipped": 0,"failed": 0},"hits": {"total": {"value": 1,"relation": "eq"},"max_score": 1.6739764,"hits": [{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_01","_score": 1.6739764,"_source": {"RCRD_ID": "tr_rd_01","STATE": "PDOS","BUSI_CODE": "pdi"},"inner_hits": {"LOANS": {"hits": {"total": {"value": 1,"relation": "eq"},"max_score": 1.5404451,"hits": [{"_index": "pdi_cust","_type": "_doc","_id": "tr_rd_01","_nested": {"field": "LOANS","offset": 0},"_score": 1.5404451,"_source": {"CUST_NUM": "CUST_NUM_01","DATA_SRC": "VALD","LOAN_BAL_SUM": "1111","LOAN_NUM": "LOAN_NUM_01","OVD_MONEY_SUM": "1111","PUB_CUST_LABEL": "張三 李四 王五"}}]}}}}]} }

【小結】

1、對于 keyword類型的字段而言， 用 term 和 match 都是可以查詢的；但對于 text 類型的分詞字段而言，只能用match 才能夠查詢到結果；

2、根據嵌套類型查詢? （filter 與 must 是屬于同一個級別的查詢方式，都可以作為 query->bool? 的屬性）
2.1、filter： 不計算評分， 查詢效率高；有緩存； ?（推薦）
?? ?+ term： 精確匹配；
?? ?+ match： 模糊匹配， 倒排索引；
2.2、must： 要計算評分，查詢效率低；無緩存；
?? ?+term： 精確匹配 ， 要評分；
?? ?+match：模糊匹配， 要評分；

總結

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