songwdfu commented on code in PR #16152:
URL: https://github.com/apache/pinot/pull/16152#discussion_r2157227246
##########
pinot-query-runtime/src/main/java/org/apache/pinot/query/runtime/operator/BaseJoinOperator.java:
##########
@@ -376,4 +382,126 @@ public StatMap.Type getType() {
return _type;
}
}
+
+ /**
+ * This util class is a view over the left and right row joined together
+ * currently this is used for filtering and input of projection. So if the
joined
+ * tuple doesn't pass the predicate, the join result is not materialized
into Object[].
+ *
+ * It is debatable whether we always want to use this instead of copying the
tuple
+ */
+ private abstract static class JoinedRowView extends AbstractList<Object>
implements List<Object> {
Review Comment:
I think this one doesn't support `null` on either side? Maybe keeping this
as seperate would be better clarity and less if-else branching
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