Lucene - comparing data in multiple indices

Question

Can I compare data from multiple Lucene indexes? I would like to get documents that have the same value in similar fields (for example, first name, last name) for two indexes. Does Lucence support queries that can do this?

Answer 1

Well, in part. You can create identical document schemas by index and at least choose the right set of hits. However, as Lucene's similarity documentation shows , the idf (return document frequency) coefficient for Lucene counting depends on both the size of the index and the number of documents that have a search query in the index. Both of these factors are index dependent. Therefore, the same match from different indices may have different points depending on these factors.