solr - Solr DisMax 查询等效项

Question

我正在尝试在 SOLR 3.5.0 中设置提升处理程序，我需要以下等效于 dismax 格式的查询，它根据匹配类型在同一字段上定义不同的提升值（精确匹配获得 200，而通配符匹配获得 100） .

q=name:(foo*^100.0 或 foo^200.0)

Answer 1

This is one way to solve this problem.

Keep a text field with only WhiteSpaceTokenizer (and maybe LowerCaseFilter depending on your case-sensitivity needs). Use this field for the exact match. Let's call this field name_ws.

Instead of using a wild-card query on name_ws, use a text-type copy field with EdgeNGramTokenizer in your analyzer chain, which will output tokens like:

food -> f, fo, foo, food

Let's call this field name_edge.

Then you can issue this dismax query:

q=foo&defType=dismax&qf=name_ws^200+name_edge^100

(Add debugQuery=on to verify if the scoring works the way you want.)