soupam05 commented on code in PR #16038:
URL: https://github.com/apache/pinot/pull/16038#discussion_r2143256969
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pinot-query-runtime/src/main/java/org/apache/pinot/query/runtime/operator/HashJoinOperator.java:
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@@ -234,6 +289,11 @@ private List<Object[]>
buildJoinedDataBlockAnti(MseBlock.Data leftBlock) {
for (Object[] leftRow : leftRows) {
Object key = _leftKeySelector.getKey(leftRow);
// ANTI-JOIN only checks non-existence of the key
+ // For ANTI-JOIN, rows with null keys should be included (null !=
anything)
+ if (isNullKey(key)) {
+ rows.add(leftRow);
+ continue;
+ }
Review Comment:
Can you please explain the concern for ANTI JOIN?
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