如何创建更复杂的Lucene查询字符串? [英] How to create more complex Lucene query strings?
问题描述
这个问题是从这中分离出来的题。
我的查询是双重的,但是因为两者都是相关的,所以我认为将它们放在一起是一个好主意。
- 如何以编程方式创建查询。我知道我可以开始创建字符串并获得用查询解析器解析的字符串。但是,当我从其他资源收集信息时,有一种编程方式可以做到这一点。
- Lucene查询的语法规则是什么?
- 编辑 -
我会给出一个我希望查询的要求示例make:
假设我有5个字段:
- 名字
- 姓
- 年龄
- 地址
-
所有字段都是可选的,最后一个字段应该搜索所有其他字段。
我遍历每一个领域,看看它是否是IsNullOrEmpty()。如果不是,我想附加一部分查询,以便添加相关的搜索部分。
名字和姓氏应该完全匹配,并且与其他字段相比具有更多的权重。年龄是一个字符串,应该完全匹配。地址可以按顺序排列。一切都可以按顺序排列。
我应该如何去解决这个问题?
解决方案使用布尔查询
a>类来组成查询对象。创建其中一个,并添加()其他Query对象来创建一个更大的,不连贯的查询:
$ b- BooleanQuery q = new BooleanQuery ;
- q.add(qFirstName,Occur.SHOULD);
- q.add(qLastName,Occur.SHOULD);
- How to programmatically create queries. I know I could start creating strings and get that string parsed with the query parser. But as I gather bits and pieces of information from other resources, there is a programattical way to do this.
- What are the syntax rules for the Lucene queries?
- First Name
- Last Name
- Age
- Address
- Everything
- BooleanQuery q = new BooleanQuery();
- q.add(qFirstName, Occur.SHOULD);
- q.add(qLastName, Occur.SHOULD);
- ...
$ b原子查询可以使用Term和TermQuery类来构建。
(链接和示例适用于Lucene Java,但.NET应该类似。)
This question is a spin-off from this question. My inquiry is two-fold, but because both are related I think it is a good idea to put them together.
--EDIT--
I'll give a requirement example for a query I would like to make:
Say I have 5 fields:All fields are optional, the last field should search over all the other fields. I go over every field and see if it's IsNullOrEmpty(). If it's not, I would like to append a part of my query so it adds the relevant search part.
First name and last name should be exact matches and have more weight then the other fields. Age is a string and should exact match. Address can varry in order. Everything can also varry in order.How should I go about this?
解决方案Use the BooleanQuery class to compose query objects. Create one of these and add() other Query objects to it to create a larger, disjunctive query:
Atomic queries can be built with the Term and TermQuery classes.
(Links and example are for Lucene Java, but .NET should be similar.)
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