jpountz commented on a change in pull request #445:
URL: https://github.com/apache/lucene/pull/445#discussion_r750295570
##########
File path:
lucene/core/src/java/org/apache/lucene/search/DocValuesFieldExistsQuery.java
##########
@@ -74,6 +74,16 @@ public Scorer scorer(LeafReaderContext context) throws
IOException {
return new ConstantScoreScorer(this, score(), scoreMode, iterator);
}
+ @Override
+ public int count(LeafReaderContext context) throws IOException {
+ final LeafReader reader = context.reader();
+ FieldInfo fieldInfo = reader.getFieldInfos().fieldInfo(field);
+ if (fieldInfo == null || fieldInfo.getPointDimensionCount() == 0) {
+ return -1;
Review comment:
Nit: In these cases we like to fall back to the default implementation,
this way we don't have to know about what the contract is for the case when the
count cannot be computed.
```suggestion
return super.count(context);
```
##########
File path:
lucene/core/src/java/org/apache/lucene/search/DocValuesFieldExistsQuery.java
##########
@@ -74,6 +74,16 @@ public Scorer scorer(LeafReaderContext context) throws
IOException {
return new ConstantScoreScorer(this, score(), scoreMode, iterator);
}
+ @Override
+ public int count(LeafReaderContext context) throws IOException {
+ final LeafReader reader = context.reader();
+ FieldInfo fieldInfo = reader.getFieldInfos().fieldInfo(field);
+ if (fieldInfo == null || fieldInfo.getPointDimensionCount() == 0) {
Review comment:
You also need to take care of the case when there are deletions on the
segment, see how `TermWeight` handles it.
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