Add query time parent child search
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Key: LUCENE-3938
URL: https://issues.apache.org/jira/browse/LUCENE-3938
Project: Lucene - Java
Issue Type: New Feature
Components: modules/join
Reporter: Martijn van Groningen
At the moment there is support for index time parent child search with two
queries implementations and a collector. The index time parent child search
requires that documents are indexed in a block, this isn't ideal for
updatability. For example in the case of tv content and subtitles (both being
separate documents). Updating already indexed tv content with subtitles would
then require to also re-index the subtitles.
This issue focuses on the collector part for query time parent child search. I
started a while back with implementing this. Basically a two pass search
performs a parent child search. In the first pass the top N parent child
documents are resolved. In the second pass the parent or top N children are
resolved (depending if the hit is a parent or child) and are associated with
the top N parent child relation documents. Patch will follow soon.
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