Github user amansinha100 commented on a diff in the pull request:
https://github.com/apache/drill/pull/889#discussion_r135292416
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/join/JoinUtils.java
---
@@ -231,6 +236,12 @@ public static boolean isScalarSubquery(RelNode root) {
return true;
}
}
+ if (!hasMoreInputs && currentRel != null) {
+ Double rowSize =
RelMetadataQuery.instance().getMaxRowCount(currentRel);
--- End diff --
You could see the usage of RelMdMaxRowCount in Calcite [1]. It has
implementations for different Rels including Aggregate, sort+limit. I would
recommend adding some unit tests though if you are going to make the code
changes since this would be new functionality.
[1]
https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/rel/metadata/RelMdMaxRowCount.java
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