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Remove sort by primary term when reading soft-deletes ()

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With Lucene rollback (), we should never have more than one
primary term for each sequence number. Therefore we don't have to sort
by the primary term when reading soft-deletes.
This commit is contained in:
Nhat Nguyen 2019-07-02 10:53:25 -04:00
parent 1ea53979b5
commit 697cd494bf
1 changed files with 2 additions and 5 deletions

7
server/src/main/java/org/elasticsearch/index/engine/LuceneChangesSnapshot.java

@ -211,11 +211,8 @@ final class LuceneChangesSnapshot implements Translog.Snapshot {
private TopDocs searchOperations(ScoreDoc after) throws IOException {
final Query rangeQuery = LongPoint.newRangeQuery(SeqNoFieldMapper.NAME, Math.max(fromSeqNo, lastSeenSeqNo), toSeqNo);
final Sort sortedBySeqNoThenByTerm = new Sort(
new SortField(SeqNoFieldMapper.NAME, SortField.Type.LONG),
new SortField(SeqNoFieldMapper.PRIMARY_TERM_NAME, SortField.Type.LONG, true)
);
return indexSearcher.searchAfter(after, rangeQuery, searchBatchSize, sortedBySeqNoThenByTerm);
final Sort sortedBySeqNo = new Sort(new SortField(SeqNoFieldMapper.NAME, SortField.Type.LONG));
return indexSearcher.searchAfter(after, rangeQuery, searchBatchSize, sortedBySeqNo);
}
private Translog.Operation readDocAsOp(int docIndex) throws IOException {