09.span query 查询

文章目录

1. 简介
2. 样例
- 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. 简介

这里介绍的是es对lucene的spanQuery的一些使用接口，主要有下面的几种查询

span_term query: 和term查询等效，一般用来在其他span query中作为组合查询
span_near query: 和intervals查询中的match 查询很像，约束多个查询term的order和gap
span_not query: 和boost query很像，但是包含的是 include和excludes两个条件（boost query 是positive和negative）
span_or query: 结合多个span query ,和bool 查询中的should很像，只要命中一个即可
span_first query: 要查询的term在对应的field中的位置距离起始位置不能超过N
span_within query: 这个挺特殊，是分为little和big两个span query, 而且little的query中的term必须在big的多个term之间（在source field中对应的text当中）
span_containing query: 这个感觉和span_within一样，就是查询顺序不一样，先查little再过滤big条件
field_masking_span query: 可以让span-near or span-or across different fields，具体使用没有看太明白
span_multi query: Wraps a term, range, prefix, wildcard, regexp, or fuzzy query.

2. 样例

原始数据

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}}}}
}

我在测试的时候，如果exclude当中使用span term的话那么会出现exclude失效的情况，具体原因不太清楚

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}

这里的litte中的term special在源文档中必须在big查询的两个term suggester, mapping中间才行，否则查不出来

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 查询

8. field_masking_span query

这个没有用明白。。。


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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