Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/6888#discussion_r32866772
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/DataFrameDateSuite.scala ---
@@ -0,0 +1,56 @@
+/*
+ * 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 org.apache.spark.sql
+
+import java.sql.{Date, Timestamp}
+
+class DataFrameDateTimeSuite extends QueryTest {
+
+ private lazy val ctx = org.apache.spark.sql.test.TestSQLContext
+ import ctx.implicits._
+
+ test("timestamp comparison with date strings") {
+ val df = Seq(
+ (1, Timestamp.valueOf("2015-01-01 00:00:00")),
+ (2, Timestamp.valueOf("2014-01-01 00:00:00"))).toDF("i", "t")
+
+ checkAnswer(
+ df.select("t").filter($"t" <= "2014-06-01"),
+ Row(Timestamp.valueOf("2014-01-01 00:00:00")) :: Nil)
+
+
+ checkAnswer(
+ df.select("t").filter($"t" >= "2014-06-01"),
+ Row(Timestamp.valueOf("2015-01-01 00:00:00")) :: Nil)
+ }
+
+ test("date comparison with date strings") {
+ val df = Seq(
+ (1, Date.valueOf("2015-01-01")),
+ (2, Date.valueOf("2014-01-01"))).toDF("i", "t")
+
+ checkAnswer(
+ df.select("t").filter($"t" <= "2014-06-01"),
+ Row(Date.valueOf("2014-01-01")) :: Nil)
+
+
+ checkAnswer(
+ df.select("t").filter($"t" >= "2014-06-01"),
--- End diff --
Very minor: change it to `$"t" >= "2014"`?
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