[LUCENE-9938] ConjunctionDISI should recognize DocIdSetIterator.all

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Invalid
• Component/s: core/search
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: David Smiley
• Created: 26/Apr/21 23:35
• Updated: 28/Aug/22 16:20
• Resolved: 27/Apr/21 04:04

Description

ConjunctionDISI creates an aggregation of some leaf DocIdSetIterators & TwoPhaseIterators. It's not uncommon for DocIdSetIterator.all(...) to wind up inside it, producing an aggregation that is a little more bulky than it needs be. This can happen frequently with the ValueSource APIs which have queries like FunctionMatchQuery that use this for the "approximation" alongside a TwoPhaseIterator.