himanish-star commented on code in PR #15107:
URL: https://github.com/apache/pinot/pull/15107#discussion_r1982473423
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pinot-segment-local/src/main/java/org/apache/pinot/segment/local/upsert/merger/PartialUpsertColumnarMerger.java:
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@@ -74,7 +75,10 @@ public void merge(LazyRow previousRow, GenericRow newRow,
Map<String, Object> re
// (1) If the value of the previous is null value, skip merging and use
the new value
// (2) Else If the value of new value is null, use the previous value
(even for comparison columns)
// (3) Else If the column is not a comparison column, we applied the
merged value to it
- if (!(merger instanceof OverwriteMerger)) {
+ if (merger instanceof ForceOverwriteMerger) {
Review Comment:
Added comments
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