Github user jihoonson commented on a diff in the pull request:
https://github.com/apache/tajo/pull/13#discussion_r13899646
--- Diff:
tajo-core/src/main/java/org/apache/tajo/engine/eval/BinaryEval.java ---
@@ -100,7 +100,7 @@ public EvalNode getExpr(int id) {
/**
* This is verified by ExprsVerifier.checkArithmeticOperand().
*/
- private DataType determineType(DataType left, DataType right) throws
InvalidEvalException {
+ public static DataType determineType(DataType left, DataType right)
throws InvalidEvalException {
--- End diff --
How about move this function to any Util classes?
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