Github user hyunsik commented on a diff in the pull request:
https://github.com/apache/tajo/pull/1016#discussion_r63132708
--- Diff:
tajo-core-tests/src/test/java/org/apache/tajo/engine/eval/TestEvalTree.java ---
@@ -385,4 +384,34 @@ private void assertCloneEqual(EvalNode eval) throws
CloneNotSupportedException {
assertEquals(eval, copy);
assertFalse(eval == copy);
}
+
+ @Test
+ public final void testHashAndEqual() {
+ EvalNode e1 = new BinaryEval(EvalType.EQUAL,
+ new FieldEval("default.n1.n_nationkey", TypeFactory.create(INT4)),
+ new FieldEval("default.n2.n_nationkey", TypeFactory.create(INT4))
+ );
+
+ EvalNode e2 = new BinaryEval(EvalType.EQUAL,
+ new FieldEval("default.n1.n_name", TypeFactory.create(INT4)),
+ new FieldEval("default.n2.n_name", TypeFactory.create(INT4))
+ );
+
+ EvalNode e3 = new BinaryEval(EvalType.EQUAL,
+ new FieldEval("default.n1.n_regionkey", TypeFactory.create(INT4)),
+ new FieldEval("default.n2.n_regionkey", TypeFactory.create(INT4))
+ );
+
+ EvalNode e4 = new BinaryEval(EvalType.EQUAL,
+ new FieldEval("default.n1.n_comment", TypeFactory.create(TEXT)),
+ new FieldEval("default.n2.n_comment", TypeFactory.create(TEXT))
+ );
+
+ FieldEval f1 = new FieldEval("default.n1.n_nationkey",
TypeFactory.create(INT4));
+ System.out.println(f1.hashCode());
--- End diff --
Actually, I made this test for debugging. I removed the test and inserted
the comparison of hash code to TestEvalTree::assertCloneEqual, which is widely
used in TestEvalTree.
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