Hi Lucene developers, In Lucene-7.7.0, I find that in `PointInSetQuery.createWeight()`, and in the method `scorer()` after `values.intersect()`, if the `result.bitSet` is null, then the `result.build()` would use `concat()` to generate a Buffer and the length is 1. And the element of array is `NO_MORE_DOCS`.
Why not return null in the method `scorer()` if `result.bitSet` is null ? In the following case: SubQuery1 AND SubQuery2 AND SubQuery3 …... BooleanWeight.scorerSupplier() -> the first subScorer of query is PointInSetQuery -> scorer() -> after intersect if result.bitSet is null, there is no specific point value at all then return null -> This will terminate early in the BooleanWeight.scoreSupplier() because subScore is null and the boolean clause is required The following SubQuery2, SubQuery3, SubQuery4 …. Need not to call scorerSupplier() to build scorer hacker win7 [email protected]
