Apache Solr - 过滤查询中的OR

Question

Is it possible to search (with apache Solr) for items which are in one of few categories using filter query, eg items in category 'computers' OR 'phones'

When I want to search for items in category computers AND phones I type:

select/?q=...&fq=cat:computers&fq=cat:phones

but it is possible to use OR instead of AND ?

Answer 1

您可以使用

fq=cat:(computers OR phones)

Answer 2

A filter query is just a query -- as complex as you'd like. So, you can certainly build up a query, eg,

fq=(cat1:val1 OR cat2:val2 OR (cat3:(val3 AND val4)))

...or whatever.

The only difference between a filter query and a plain-old query (besides memory and caching issues, which you might want to also think about) is that a filter query doesn't affect the relevancy scores at all. But in terms of complexity, you can do whatever you want.