Github user vkorukanti commented on a diff in the pull request:
https://github.com/apache/drill/pull/462#discussion_r58742546
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/common/DrillRelOptUtil.java
---
@@ -169,4 +176,223 @@ private static boolean containIdentity(List<? extends
RexNode> exps,
}
return true;
}
+
+ /**
+ * Copied from {@link RelOptUtil#splitJoinCondition(RelNode, RelNode,
RexNode, List, List)}. Modified to rewrite
--- End diff --
I will followup with a JIRA on Calcite project to see if we can push this
change to Calcite.
The function ```RelOptUtil#splitJoinCondition``` in the current form itself
seems to have a problem/limitation. Currently it just returns the left and
right join key indices, but doesn't return whether the condition is ```EQUAL```
or ```IS NOT DISTINCT FROM``` (it adds the key pair if they have either of
these function in comparison).
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