Github user myui commented on a diff in the pull request:
https://github.com/apache/incubator-hivemall/pull/160#discussion_r214800712
--- Diff: core/src/main/java/hivemall/tools/math/IsInfiniteUDF.java ---
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package hivemall.tools.math;
+
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+
+@Description(name = "is_infinite", value = "_FUNC_(x) - Determine if x is
infinite.")
+public final class IsInfiniteUDF extends UDF {
+ public Boolean evaluate(Double num) {
+ if (num == null) {
+ return null;
+ } else {
+ return !num.isNaN() && num.isInfinite();
--- End diff --
Is `!num.isNaN() &&` required?
---
