如何查询Lucene中的空白字段? [英] How to query lucene for empty fields?

问题描述

我希望在查询的第二部分中有一个while数据不为null的结果列表.我发现如何在solr中而不是在lucene中做到这一点. 任何人都有一个主意 谢谢

I want in 2nd part of my query to have a list of result for while data not null. I find how do it in solr but not in lucene. Anyone have a idea Thanks

字符串:

(field_one:search AND field_two:3000)或(field_three:search AND field_two:3000 AND NOT NULL field_one )

( field_one:search AND field_two:3000) OR (field_three:search AND field_two:3000 AND NOT NULL field_one )

查询:

+ field_one:search + field_two:3000 + field_three:search + field_two:3000 -field_one:null

+field_one:search +field_two:3000 +field_three:search +field_two:3000 -field_one:null

推荐答案

*:*  -MY_FIELD_NAME:[* TO *] 

上面应该做到这一点，注意Lucene的*:*.

The above should do it, note the * : * for Lucene.

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