[LUCENE-8606] ConstantScoreQuery looses explain details of wrapped query

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Christian Ziech
• Created: 12/Dec/18 11:16
• Updated: 28/Aug/22 15:39

Description

Right now the ConstantScoreWeigth used by the ConstantScoreQuery is not adding the details of the wrapped query to the explanation.

if (exists) {
    return Explanation.match(score, getQuery().toString() + (score == 1f ? "" : "^" + score));
} else {
    return Explanation.noMatch(getQuery().toString() + " doesn't match id " + doc);
}

This is kind of inconvenient as it makes it kind of hard to figure out which term finally really matched when one e.g. puts a BooleanQuery into the FILTER clause of another BooleanQuery.