{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/33113199","id":33113199,"diff_hunk":"@@ -0,0 +1,176 @@\n+/*\n+ * Licensed to the Apache Software Foundation (ASF) under one or more\n+ * contributor license agreements.  See the NOTICE file distributed with\n+ * this work for additional information regarding copyright ownership.\n+ * The ASF licenses this file to You under the Apache License, Version 2.0\n+ * (the \"License\"); you may not use this file except in compliance with\n+ * the License.  You may obtain a copy of the License at\n+ *\n+ *    http://www.apache.org/licenses/LICENSE-2.0\n+ *\n+ * Unless required by applicable law or agreed to in writing, software\n+ * distributed under the License is distributed on an \"AS IS\" BASIS,\n+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n+ * See the License for the specific language governing permissions and\n+ * limitations under the License.\n+ */\n+\n+package org.apache.spark.sql.catalyst.expressions\n+\n+import org.apache.spark.sql.catalyst.analysis.TypeCheckResult\n+import org.apache.spark.sql.catalyst.expressions.codegen.{GeneratedExpressionCode, CodeGenContext}\n+import org.apache.spark.sql.catalyst.util.DateUtils\n+import org.apache.spark.sql.types._\n+import org.apache.spark.unsafe.types.UTF8String\n+\n+/**\n+ * Adds a number of days to startdate: date_add('2008-12-31', 1) = '2009-01-01'.\n+ */\n+case class DateAdd(startDate: Expression, days: Expression) extends Expression {\n+  override def children: Seq[Expression] = startDate :: days :: Nil\n+\n+  override def foldable: Boolean = startDate.foldable && days.foldable\n+  override def nullable: Boolean = startDate.nullable || days.nullable\n+\n+  override def checkInputDataTypes(): TypeCheckResult = {\n+    val supportedLeftType = Seq(StringType, DateType, TimestampType, NullType)\n+    if (!supportedLeftType.contains(startDate.dataType)) {\n+      TypeCheckResult.TypeCheckFailure(\n+        s\"type of startdate expression in DateAdd should be string/timestamp/date,\" +\n+          s\" not ${startDate.dataType}\")\n+    } else if (days.dataType != IntegerType && days.dataType != NullType) {\n+      TypeCheckResult.TypeCheckFailure(\n+        s\"type of days expression in DateAdd should be int, not ${days.dataType}.\")\n+    } else {\n+      TypeCheckResult.TypeCheckSuccess\n+    }\n+  }\n+\n+  override def dataType: DataType = StringType\n+\n+  override def toString: String = s\"DateAdd($startDate, $days)\"","path":"sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeFunctions.scala","position":51,"original_position":51,"commit_id":"eebf41db3a5d80a0f7c1bb3ac6cb17aa090c0da7","original_commit_id":"eebf41db3a5d80a0f7c1bb3ac6cb17aa090c0da7","user":{"login":"chenghao-intel","id":2367031,"avatar_url":"https://avatars.githubusercontent.com/u/2367031?v=3","gravatar_id":"","url":"https://api.github.com/users/chenghao-intel","html_url":"https://github.com/chenghao-intel","followers_url":"https://api.github.com/users/chenghao-intel/followers","following_url":"https://api.github.com/users/chenghao-intel/following{/other_user}","gists_url":"https://api.github.com/users/chenghao-intel/gists{/gist_id}","starred_url":"https://api.github.com/users/chenghao-intel/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/chenghao-intel/subscriptions","organizations_url":"https://api.github.com/users/chenghao-intel/orgs","repos_url":"https://api.github.com/users/chenghao-intel/repos","events_url":"https://api.github.com/users/chenghao-intel/events{/privacy}","received_events_url":"https://api.github.com/users/chenghao-intel/received_events","type":"User","site_admin":false},"body":"Let's remove this as the case class will handle that pretty well.","created_at":"2015-06-24T02:36:36Z","updated_at":"2015-06-24T02:36:36Z","html_url":"https://github.com/apache/spark/pull/6782#discussion_r33113199","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/6782","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/33113199"},"html":{"href":"https://github.com/apache/spark/pull/6782#discussion_r33113199"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/6782"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/6782","id":37536496,"html_url":"https://github.com/apache/spark/pull/6782","diff_url":"https://github.com/apache/spark/pull/6782.diff","patch_url":"https://github.com/apache/spark/pull/6782.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/6782","number":6782,"state":"open","locked":false,"title":"[SPARK-8186] [SPARK-8187] [SQL] datetime function: date_add, 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