Github user jihoonson commented on a diff in the pull request:
https://github.com/apache/tajo/pull/692#discussion_r40165600
--- Diff:
tajo-plan/src/main/java/org/apache/tajo/plan/joinorder/GreedyHeuristicJoinOrderAlgorithm.java
---
@@ -484,7 +487,7 @@ public static double getCost(LogicalNode node) {
default:
// all binary operators (join, union, except, and intersect) are
handled in the above cases.
// So, we need to handle only unary nodes in default.
- cost = getCost(((UnaryNode) node).getChild());
+ cost = getCost((LogicalNode)((UnaryNode) node).getChild());
--- End diff --
Duplicate cast
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