Thanks Mike and Adrien for confirming the behavior!
I checked again and debugged the unit case and found it is
IndexSearcher.createWeight will be recursively called when BooleanQuery is
creating weight (
https://github.com/apache/lucene-solr/blob/e88b3e9c204f907fdb41d6d0f40d685574acde97/lucene/core
It does recurse indeed! To reuse Mike's example, in that case the cache
would consider caching:
- A,
- B,
- C,
- D,
- (C D),
- +A +B +(C D)
One weakness of this cache is that it doesn't consider caching subsets of
boolean queries (except single clauses). E.g. in the above example, it
would n
Hi Haoyu,
I'm pretty sure (but not certain!) that query cache is smart enough to
recurse through the full query tree, and consider any of the whole queries
it finds during that recursion.
So e.g. a query like +A +B +(C D) would consider caching A, B, C D, or the
whole original +A +B +(C D) query.
Hi folks,
I'm trying to understand how QueryCache works and one question popped out
of my head was that is QueryCache caching
1. the whole query that being submitted to IndexSearcher or
2. it will recurse into the query and selectively caching some of the
clauses (especially for BooleanQuery)?
>Fr
