deemoliu commented on code in PR #10927:
URL: https://github.com/apache/pinot/pull/10927#discussion_r1237805324
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/upsert/ConcurrentMapPartitionUpsertMetadataManager.java:
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@@ -219,6 +221,10 @@ protected void doAddRecord(MutableSegment segment,
RecordInfo recordInfo) {
@Override
protected GenericRow doUpdateRecord(GenericRow record, RecordInfo
recordInfo) {
assert _partialUpsertHandler != null;
+ // For Overwrite merger, it respects the incoming values unless it's null.
We can use this to optimize disk read.
+ if
(UpsertConfig.Strategy.OVERWRITE.equals(_partialUpsertHandler.getDefaultPartialUpsertMerger()))
{
Review Comment:
good catch, thanks! I though the defaultMerger in upsertHandler is a enum.
Let me update this part.
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