{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/28749336","id":28749336,"diff_hunk":"@@ -0,0 +1,43 @@\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.hive\n+\n+import org.apache.hadoop.hive.ql.exec.Description\n+import org.apache.hadoop.hive.ql.session.SessionState\n+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector\n+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF\n+import org.apache.spark.sql.types._\n+\n+// deterministic in the query range\n+@Description(name = \"current_database\",\n+    value = \"_FUNC_() - returns currently using database name\")\n+class sqlUDFCurrentDB extends GenericUDF {\n+\n+  override def initialize(arguments: Array[ObjectInspector]): ObjectInspector = {\n+    val database = SessionState.get.getCurrentDatabase\n+    HiveShim.getStringWritableConstantObjectInspector(UTF8String(database))\n+  }\n+\n+  override def evaluate(arguments: Array[GenericUDF.DeferredObject]): Object = {\n+    SessionState.get.getCurrentDatabase","path":"sql/hive/src/main/scala/org/apache/spark/sql/hive/sqlUDFCurrentDB.scala","position":37,"original_position":37,"commit_id":"fad020ebc9a1bd1a98a8c758d770d947205e89b1","original_commit_id":"fad020ebc9a1bd1a98a8c758d770d947205e89b1","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":"As @rxin mentioned in #4995, this probably doesn't work in a distributed mode, since `hive-site.xml` probably not included in the classpath of the executor classloader.","created_at":"2015-04-21T04:29:36Z","updated_at":"2015-04-21T04:29:36Z","html_url":"https://github.com/apache/spark/pull/5538#discussion_r28749336","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/5538","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/28749336"},"html":{"href":"https://github.com/apache/spark/pull/5538#discussion_r28749336"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/5538"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/5538","id":33415445,"html_url":"https://github.com/apache/spark/pull/5538","diff_url":"https://github.com/apache/spark/pull/5538.diff","patch_url":"https://github.com/apache/spark/pull/5538.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/5538","number":5538,"state":"open","locked":false,"title":"[SPARK-6198][SQL] Support \"select current_database()\"","user":{"login":"DoingDone9","id":7529754,"avatar_url":"https://avatars.githubusercontent.com/u/7529754?v=3","gravatar_id":"","url":"https://api.github.com/users/DoingDone9","html_url":"https://github.com/DoingDone9","followers_url":"https://api.github.com/users/DoingDone9/followers","following_url":"https://api.github.com/users/DoingDone9/following{/other_user}","gists_url":"https://api.github.com/users/DoingDone9/gists{/gist_id}","starred_url":"https://api.github.com/users/DoingDone9/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/DoingDone9/subscriptions","organizations_url":"https://api.github.com/users/DoingDone9/orgs","repos_url":"https://api.github.com/users/DoingDone9/repos","events_url":"https://api.github.com/users/DoingDone9/events{/privacy}","received_events_url":"https://api.github.com/users/DoingDone9/received_events","type":"User","site_admin":false},"body":"to support \"select current_database()\"\r\n```\r\nThe method(evaluate) has changed in UDFCurrentDB, it just throws a exception.But hiveUdfs call this method and failed.\r\n@Override\r\npublic Object evaluate(DeferredObject[] arguments) throws HiveException\r\n{ throw new IllegalStateException(\"never\");\r\n","created_at":"2015-04-16T03:03:49Z","updated_at":"2015-04-21T04:29:36Z","closed_at":null,"merged_at":null,"merge_commit_sha":"7f23829c97f665b5cf541af6f29cfe23bf071de7","assignee":null,"milestone":null,"commits_url":"https://api.github.com/repos/apache/spark/pulls/5538/commits","review_comments_url":"https://api.github.com/repos/apache/spark/pulls/5538/comments","review_comment_url":"https://api.github.com/repos/apache/spark/pulls/comments{/number}","comments_url":"https://api.github.com/repos/apache/spark/issues/5538/comments","statuses_url":"https://api.github.com/repos/apache/spark/statuses/fad020ebc9a1bd1a98a8c758d770d947205e89b1","head":{"label":"DoingDone9:current_database","ref":"current_database","sha":"fad020ebc9a1bd1a98a8c758d770d947205e89b1","user":{"login":"DoingDone9","id":7529754,"avatar_url":"https://avatars.githubusercontent.com/u/7529754?v=3","gravatar_id":"","url":"https://api.github.com/users/DoingDone9","html_url":"https://github.com/DoingDone9","followers_url":"https://api.github.com/users/DoingDone9/followers","following_url":"https://api.github.com/users/DoingDone9/following{/other_user}","gists_url":"https://api.github.com/users/DoingDone9/gists{/gist_id}","starred_url":"https://api.github.com/users/DoingDone9/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/DoingDone9/subscriptions","organizations_url":"https://api.github.com/users/DoingDone9/orgs","repos_url":"https://api.github.com/users/DoingDone9/repos","events_url":"https://api.github.com/users/DoingDone9/events{/privacy}","received_events_url":"https://api.github.com/users/DoingDone9/received_events","type":"User","site_admin":false},"repo":{"id":30402760,"name":"spark","full_name":"DoingDone9/spark","owner":{"login":"DoingDone9","id":7529754,"avatar_url":"https://avatars.githubusercontent.com/u/7529754?v=3","gravatar_id":"","url":"https://api.github.com/users/DoingDone9","html_url":"https://github.com/DoingDone9","followers_url":"https://api.github.com/users/DoingDone9/followers","following_url":"https://api.github.com/users/DoingDone9/following{/other_user}","gists_url":"https://api.github.com/users/DoingDone9/gists{/gist_id}","starred_url":"https://api.github.com/users/DoingDone9/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/DoingDone9/subscriptions","organizations_url":"https://api.github.com/users/DoingDone9/orgs","repos_url":"https://api.github.com/users/DoingDone9/repos","events_url":"https://api.github.com/users/DoingDone9/events{/privacy}","received_events_url":"https://api.github.com/users/DoingDone9/received_events","type":"User","site_admin":false},"private":false,"html_url":"https://github.com/DoingDone9/spark","description":"Mirror 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