LuXugang commented on PR #12405:
URL: https://github.com/apache/lucene/pull/12405#issuecomment-1613330925
```java
public void test() throws IOException {
final Directory dir = newDirectory();
IndexWriterConfig config =
new IndexWriterConfig()
// Make sure to use the default codec, otherwise some
random points formats that have
// large values for maxPointsPerLeaf might not enable
skipping with only 10k docs
.setCodec(TestUtil.getDefaultCodec());
final IndexWriter writer = new IndexWriter(dir, config);
final int numDocs = atLeast(10000);
final int missValuesNumDocs = numDocs / 2;
for (int i = 0; i < numDocs; ++i) {
final Document doc = new Document();
if (i <= missValuesNumDocs) { // missing value document
} else {
doc.add(new NumericDocValuesField("my_field", i));
doc.add(new LongPoint("my_field", i));
}
writer.addDocument(doc);
}
final IndexReader reader = DirectoryReader.open(writer);
writer.close();
// single threaded so totalHits is deterministic
IndexSearcher searcher =
newSearcher(reader, random().nextBoolean(),
random().nextBoolean(), false);
final int numHits = 3;
final int totalHitsThreshold = 3;
{ // test that optimization is run with NumericDocValues when missing
value is NOT competitive
final SortField sortField = new SortField("my_field",
SortField.Type.LONG, true);
sortField.setMissingValue(0L); // missing value is not competitive
final Sort sort = new Sort(sortField);
CollectorManager<TopFieldCollector, TopFieldDocs> manager =
TopFieldCollector.createSharedManager(sort, numHits, null,
totalHitsThreshold);
TopDocs topDocs = searcher.search(new MatchAllDocsQuery(), manager);
assertEquals(topDocs.scoreDocs.length, numHits);
assertEquals(
topDocs.totalHits.value,
numDocs); // assert that all documents were collected =>
optimization was not run
}
reader.close();
dir.close();
}
```
This test shows we could not skip document by bkd, but could use
`NumericDocValues` to skip docs inthis RP.
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