Hi, When using Lucene’s query-time join feature [1], how can the hits from the first phase which determine / contribute to the returned results be retrieved?
This topic has been brought up before [2], and at the time the recommendation was to re-run the query with added constraints based on the join fields values. Is there any alternative way of doing this when trying to get the contributing hits for every returned result and in the context of having multiple terms in the toField? I see that the info that is being tracked by the Join API refers to the scores and the terms collected in the first phase. During this feature’s development [3] there was also a 3-phased approach taken into consideration, which involved recording fromSearcher’s docIds, translating them into joinable terms and then recording toSearcher’s docIds. However, even if docId info would be recorded between phases, it would then have to be exposed somehow. Thanks, Stefan Onofrei [1] https://lucene.apache.org/core/8_5_1/join/org/apache/lucene/search/join/JoinUtil.html [2] https://lucene.472066.n3.nabble.com/access-to-joined-documents-td4412376.html [3] https://issues.apache.org/jira/browse/LUCENE-3602
