{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/58006735","id":58006735,"diff_hunk":"@@ -67,9 +77,14 @@ class SimpleFunctionRegistry extends FunctionRegistry {\n   }\n \n   override def lookupFunction(name: String, children: Seq[Expression]): Expression = {\n+    val builder = functionBuilders.get(name)\n+    if (builder.isEmpty) {\n+      throw new AnalysisException(s\"undefined function $name\")\n+    }\n     val func = synchronized {\n-      functionBuilders.get(name).map(_._2).getOrElse {\n-        throw new AnalysisException(s\"undefined function $name\")\n+      Try(builder.map(_._2)) match {","path":"sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala","position":35,"original_position":35,"commit_id":"acf9299a79684dbb063efa035323726c753c682d","original_commit_id":"acf9299a79684dbb063efa035323726c753c682d","user":{"login":"viirya","id":68855,"avatar_url":"https://avatars.githubusercontent.com/u/68855?v=3","gravatar_id":"","url":"https://api.github.com/users/viirya","html_url":"https://github.com/viirya","followers_url":"https://api.github.com/users/viirya/followers","following_url":"https://api.github.com/users/viirya/following{/other_user}","gists_url":"https://api.github.com/users/viirya/gists{/gist_id}","starred_url":"https://api.github.com/users/viirya/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/viirya/subscriptions","organizations_url":"https://api.github.com/users/viirya/orgs","repos_url":"https://api.github.com/users/viirya/repos","events_url":"https://api.github.com/users/viirya/events{/privacy}","received_events_url":"https://api.github.com/users/viirya/received_events","type":"User","site_admin":false},"body":"Hive's exception will be thrown. I faced the exception thrown in working on the changes. One jenkins test checks the error message. We will miss the actual exception and message and only get AnalysisException with `undefined function` here. I think it is proper to show real error message.","created_at":"2016-03-31T06:39:13Z","updated_at":"2016-03-31T06:39:13Z","html_url":"https://github.com/apache/spark/pull/12036#discussion_r58006735","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/12036","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/58006735"},"html":{"href":"https://github.com/apache/spark/pull/12036#discussion_r58006735"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/12036"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/12036","id":64457751,"html_url":"https://github.com/apache/spark/pull/12036","diff_url":"https://github.com/apache/spark/pull/12036.diff","patch_url":"https://github.com/apache/spark/pull/12036.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/12036","number":12036,"state":"open","locked":false,"title":"[SPARK-14123][SQL] Implement function related DDL commands","user":{"login":"viirya","id":68855,"avatar_url":"https://avatars.githubusercontent.com/u/68855?v=3","gravatar_id":"","url":"https://api.github.com/users/viirya","html_url":"https://github.com/viirya","followers_url":"https://api.github.com/users/viirya/followers","following_url":"https://api.github.com/users/viirya/following{/other_user}","gists_url":"https://api.github.com/users/viirya/gists{/gist_id}","starred_url":"https://api.github.com/users/viirya/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/viirya/subscriptions","organizations_url":"https://api.github.com/users/viirya/orgs","repos_url":"https://api.github.com/users/viirya/repos","events_url":"https://api.github.com/users/viirya/events{/privacy}","received_events_url":"https://api.github.com/users/viirya/received_events","type":"User","site_admin":false},"body":"## What changes were proposed in this pull request?\r\nJIRA: https://issues.apache.org/jira/browse/SPARK-14123\r\n\r\nThis PR adds the support of native DDL commands to create and drop (temporary) functions.\r\n\r\nFor temporary function, these DDL commands call `FunctionRegistry` related APIs. This PR modifies current `FunctionRegistry` and `HiveFunctionRegistry` APIs to have proper temporary function support.\r\n\r\nFor permanent function, we simply calls `Catalog` APIs.\r\n\r\n## How was this patch tested?\r\nExisting tests.\r\n\r\n\r\n","created_at":"2016-03-29T12:33:31Z","updated_at":"2016-03-31T06:39:13Z","closed_at":null,"merged_at":null,"merge_commit_sha":"a345981af97b186badd3d1fed8d04f5558e36dc2","assignee":null,"milestone":null,"commits_url":"https://api.github.com/repos/apache/spark/pulls/12036/commits","review_comments_url":"https://api.github.com/repos/apache/spark/pulls/12036/comments","review_comment_url":"https://api.github.com/repos/apache/spark/pulls/comments{/number}","comments_url":"https://api.github.com/repos/apache/spark/issues/12036/comments","statuses_url":"https://api.github.com/repos/apache/spark/statuses/acf9299a79684dbb063efa035323726c753c682d","head":{"label":"viirya:native-ddl-function","ref":"native-ddl-function","sha":"acf9299a79684dbb063efa035323726c753c682d","user":{"login":"viirya","id":68855,"avatar_url":"https://avatars.githubusercontent.com/u/68855?v=3","gravatar_id":"","url":"https://api.github.com/users/viirya","html_url":"https://github.com/viirya","followers_url":"https://api.github.com/users/viirya/followers","following_url":"https://api.github.com/users/viirya/following{/other_user}","gists_url":"https://api.github.com/users/viirya/gists{/gist_id}","starred_url":"https://api.github.com/users/viirya/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/viirya/subscriptions","organizations_url":"https://api.github.com/users/viirya/orgs","repos_url":"https://api.github.com/users/viirya/repos","events_url":"https://api.github.com/users/viirya/events{/privacy}","received_events_url":"https://api.github.com/users/viirya/received_events","type":"User","site_admin":false},"repo":{"id":21467907,"name":"spark-1","full_name":"viirya/spark-1","owner":{"login":"viirya","id":68855,"avatar_url":"https://avatars.githubusercontent.com/u/68855?v=3","gravatar_id":"","url":"https://api.github.com/users/viirya","html_url":"https://github.com/viirya","followers_url":"https://api.github.com/users/viirya/followers","following_url":"https://api.github.com/users/viirya/following{/other_user}","gists_url":"https://api.github.com/users/viirya/gists{/gist_id}","starred_url":"https://api.github.com/users/viirya/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/viirya/subscriptions","organizations_url":"https://api.github.com/users/viirya/orgs","repos_url":"https://api.github.com/users/viirya/repos","events_url":"https://api.github.com/users/viirya/events{/privacy}","received_events_url":"https://api.github.com/users/viirya/received_events","type":"User","site_admin":false},"private":false,"html_url":"https://github.com/viirya/spark-1","description":"Mirror 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