mihaibudiu commented on code in PR #4260:
URL: https://github.com/apache/calcite/pull/4260#discussion_r2011022596
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core/src/main/java/org/apache/calcite/rel/core/JoinInfo.java:
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@@ -50,30 +52,59 @@ public class JoinInfo {
/** Creates a JoinInfo. */
protected JoinInfo(ImmutableIntList leftKeys, ImmutableIntList rightKeys,
- ImmutableList<RexNode> nonEquiConditions) {
- this.leftKeys = requireNonNull(leftKeys, "leftKeys");
- this.rightKeys = requireNonNull(rightKeys, "rightKeys");
- this.nonEquiConditions =
- requireNonNull(nonEquiConditions, "nonEquiConditions");
+ ImmutableList<RexNode> nonEquiConditions, ImmutableList<Boolean>
filterNulls,
Review Comment:
Maybe the question boils down at how HashJoin is supposed to be implemented.
In our implementation when the condition is equality (=) we filter out nulls
prior to the join.
If the condition is `IS NOT DISTINCT FROM` we don't filter the nulls.
You can use a HashJoin in both cases.
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