mayya-sharipova commented on a change in pull request #204:
URL: https://github.com/apache/lucene/pull/204#discussion_r664804322
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File path:
lucene/core/src/java/org/apache/lucene/search/comparators/DocComparator.java
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@@ -81,7 +87,12 @@ public Integer value(int slot) {
public DocLeafComparator(LeafReaderContext context) {
this.docBase = context.docBase;
if (enableSkipping) {
- this.minDoc = topValue + 1;
+ // For a single sort on _doc, we want to skip all docs before topValue.
+ // For multiple fields sort on [_doc, other fields], we want to
include docs with the same
+ // docID.
+ // This is needed in a distributed search, where there are docs from
different indices with
+ // the same docID.
+ this.minDoc = singleSort ? topValue + 1 : topValue;
Review comment:
Right, `singleSort` check is used not only for search after case.
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