如何在Lucene查询中正确转义OR和AND? [英] How to properly escape OR and AND in lucene query?

问题描述

当我在查询中传递"state:OR"时，lucene给出了一个错误，因为它认为"OR"为 boolean子句的关键字，但实际上，我是俄勒冈州(州)的缩写.

When I passed in a query "state:OR" lucene gave an error because it considers "OR" as a keyword for boolean clause, but here I actually man the abbreviation of Oregon, the state.

我已经看到引用OR使得查询变为'state:"OR"'使它起作用.

I have seen that quoting OR so the query becomes 'state:"OR"' makes it work.

但这听起来不是一个很好的方法，因为我必须对Lucene使用的每个关键字字符串进行替换:AND OR NOT和其他?我没有多少

but this doesn't sound like a very good approach, since I'll have to do a string substitution for EACH of the keywords that lucene uses: AND OR NOT and others?? I don't how many

我尝试直接构造查询而不是执行queryParser.parse()，但是看来这并没有通过分析器，这是一个大问题.

I tried directly constructing the query instead of doing queryParser.parse(), but it seems that this does not go through the analyzers, which is a big problem.

推荐答案

有很多方法可以避免这种情况，更清洁的方法是避免AND，OR和&不能带有反斜杠，例如:

There are a number of ways to escape this, the cleaner is to escape AND, OR, & NOT with leading backslashes eg:

\\AND \\OR \\NOT

或者，代码解析器不会将其小写字母等价物解析为运算符

alternately, the code parser will not parse their lowercase equivalents as operators

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