文章目錄

• • 1. 簡介
  • 2. 樣例
  • • 1. span_term query
    • 2. span_near query
    • 3. span_not query
    • 4. span_or query
    • 5. span_first query
    • 6. span_within query
    • 7. span_containing query
    • 8. field_masking_span query
    • 9. span_multi query

1. 簡介

這里介紹的是es對lucene的spanQuery的一些使用接口，主要有下面的幾種查詢

span_term query: 和term查詢等效，一般用來在其他span query中作為組合查詢

span_near query: 和intervals查詢中的match 查詢很像，約束多個查詢term的order和gap

span_not query: 和boost query很像，但是包含的是 include和excludes兩個條件（boost query 是positive和negative）

span_or query: 結合多個span query ,和bool 查詢中的should很像，只要命中一個即可

span_first query: 要查詢的term在對應的field中的位置距離起始位置不能超過N

span_within query: 這個挺特殊，是分為little和big兩個span query, 而且little的query中的term必須在big的多個term之間（在source field中對應的text當中）

span_containing query: 這個感覺和span_within一樣，就是查詢順序不一樣，先查little再過濾big條件

field_masking_span query: 可以讓span-near or span-or across different fields，具體使用沒有看太明白

span_multi query: Wraps a term, range, prefix, wildcard, regexp, or fuzzy query.

2. 樣例

原始數據

GET multi_test/_search返回 {"hits" : {"total" : {"value" : 6,"relation" : "eq"},"max_score" : 1.0,"hits" : [{"_source" : {"shingle" : "If the calculations based on the specification determine that","title" : "If the calculations based on the specification determine that","age" : 80,"status" : true}},{"_source" : {"shingle" : "my favorite food hot water","title" : "my favorite food hot water","age" : 23,"status" : true}},{"_source" : {"shingle" : "that no optional clauses are needed, the usual rules about BooleanQueries ","title" : "that no optional clauses are needed, the usual rules about BooleanQueries ","age" : 39,"status" : false}},{"_source" : {"shingle" : "rules about BooleanQueries still apply at search ","title" : "rules about BooleanQueries still apply at search ","age" : 42,"status" : false}},{"_source" : {"shingle" : "If the calculations based","title" : " suggester requires special mapping up ","age" : 38,"status" : false}},{"_source" : {"shingle" : "my favorite food is pisa","title" : "the my favorite that is pisa","age" : 35,"status" : false}}]} }

1. span_term query

GET multi_test/_search {"query": {"span_term": {"title": {"value": "that"}}} }

2. span_near query

GET multi_test/_search {"query": {"span_near": {"clauses": [{"span_term": {"title": {"value": "up"}}},{"span_term": {"title": {"value": "suggester"}}}],"slop": 3,"in_order": false}} }

3. span_not query

GET multi_test/_search {"query": {"span_not": {"include": {"span_term": {"title": {"value": "favorite"}}},"exclude": {"span_near": {"clauses": [{"span_term": {"title": {"value": "my"}}},{"span_term": {"title": {"value": "favorite"}}}],"slop": 0,"in_order": false}}}} }

我在測試的時候，如果exclude當中使用span term的話那么會出現exclude失效的情況，具體原因不太清楚

4. span_or query

GET multi_test/_search {"query": {"span_or": {"clauses": [{"span_term": {"title": {"value": "food"}}},{"span_term": {"title": {"value": "favorite"}}}]}} }

5. span_first query

GET multi_test/_search {"query": {"span_first": {"match": {"span_term": {"title": "hot"}},"end": 4}} }返回"_source" : {"shingle" : "my favorite food hot water","title" : "my favorite food hot water","age" : 23,"status" : true}

6. span_within query

GET multi_test/_search {"query": {"span_within": {"little": {"span_term": {"title": {"value": "special"}}},"big": {"span_near": {"clauses": [{"span_term": {"title": {"value": "suggester"}}},{"span_term": {"title": {"value": "mapping"}}}],"slop": 5,"in_order": false}}}} }返回 "_source" : {"shingle" : "If the calculations based","title" : " suggester requires special mapping up ","age" : 38,"status" : false}

這里的litte中的term special在源文檔中必須在big查詢的兩個term suggester, mapping中間才行，否則查不出來

7. span_containing query

GET multi_test/_search {"query": {"span_containing": {"little": {"span_term": {"title": {"value": "special"}}},"big": {"span_near": {"clauses": [{"span_term": {"title": {"value": "suggesterzh"}}},{"span_term": {"title": {"value": "mapping"}}}],"slop": 5,"in_order": false}}}} }

要求同span within 查詢

8. field_masking_span query

這個沒有用明白。。。

GET multi_test02/_search {"query": {"span_near": {"clauses": [{"span_term": {"title": "requires"}},{"field_masking_span": {"query": {"span_term": {"shingle": "based"}},"field": "title"}}],"slop": 1,"in_order": false}} }

9. span_multi query

GET multi_test/_search {"query": {"span_multi": {"match": {"prefix": {"title": {"value": "sug"}}}}} }返回"_source" : {"shingle" : "If the calculations based","title" : " suggester requires special mapping up ","age" : 38,"status" : false}

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