{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/57823320","id":57823320,"diff_hunk":"@@ -97,7 +97,8 @@ private[sql] class SparkQl(conf: ParserConf = SimpleParserConf()) extends Cataly\n \n       // CREATE DATABASE [IF NOT EXISTS] database_name [COMMENT database_comment]\n       // [LOCATION path] [WITH DBPROPERTIES (key1=val1, key2=val2, ...)];\n-      case Token(\"TOK_CREATEDATABASE\", Token(databaseName, Nil) :: args) =>","path":"sql/core/src/main/scala/org/apache/spark/sql/execution/SparkQl.scala","position":4,"original_position":4,"commit_id":"f22ef9029c20934f6763ed9b52aa2901460c5a84","original_commit_id":"f22ef9029c20934f6763ed9b52aa2901460c5a84","user":{"login":"andrewor14","id":2133137,"avatar_url":"https://avatars.githubusercontent.com/u/2133137?v=3","gravatar_id":"","url":"https://api.github.com/users/andrewor14","html_url":"https://github.com/andrewor14","followers_url":"https://api.github.com/users/andrewor14/followers","following_url":"https://api.github.com/users/andrewor14/following{/other_user}","gists_url":"https://api.github.com/users/andrewor14/gists{/gist_id}","starred_url":"https://api.github.com/users/andrewor14/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/andrewor14/subscriptions","organizations_url":"https://api.github.com/users/andrewor14/orgs","repos_url":"https://api.github.com/users/andrewor14/repos","events_url":"https://api.github.com/users/andrewor14/events{/privacy}","received_events_url":"https://api.github.com/users/andrewor14/received_events","type":"User","site_admin":false},"body":"changes in this file aren't really necessary since the file will be deleted anyway, but for now it's OK to keep","created_at":"2016-03-30T00:35:37Z","updated_at":"2016-03-30T00:35:37Z","html_url":"https://github.com/apache/spark/pull/12009#discussion_r57823320","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/12009","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/57823320"},"html":{"href":"https://github.com/apache/spark/pull/12009#discussion_r57823320"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/12009"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/12009","id":64364679,"html_url":"https://github.com/apache/spark/pull/12009","diff_url":"https://github.com/apache/spark/pull/12009.diff","patch_url":"https://github.com/apache/spark/pull/12009.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/12009","number":12009,"state":"open","locked":false,"title":"[SPARK-14124] [SQL] Implement Database-related DDL Commands","user":{"login":"gatorsmile","id":11567269,"avatar_url":"https://avatars.githubusercontent.com/u/11567269?v=3","gravatar_id":"","url":"https://api.github.com/users/gatorsmile","html_url":"https://github.com/gatorsmile","followers_url":"https://api.github.com/users/gatorsmile/followers","following_url":"https://api.github.com/users/gatorsmile/following{/other_user}","gists_url":"https://api.github.com/users/gatorsmile/gists{/gist_id}","starred_url":"https://api.github.com/users/gatorsmile/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gatorsmile/subscriptions","organizations_url":"https://api.github.com/users/gatorsmile/orgs","repos_url":"https://api.github.com/users/gatorsmile/repos","events_url":"https://api.github.com/users/gatorsmile/events{/privacy}","received_events_url":"https://api.github.com/users/gatorsmile/received_events","type":"User","site_admin":false},"body":"#### What changes were proposed in this pull request?\r\nThis PR is to implement the following four Database-related DDL commands:\r\n - `CREATE DATABASE|SCHEMA [IF NOT EXISTS] database_name`\r\n - `DROP DATABASE [IF EXISTS] database_name [RESTRICT|CASCADE]`\r\n - `DESCRIBE DATABASE [EXTENDED] db_name`\r\n - `ALTER (DATABASE|SCHEMA) database_name SET DBPROPERTIES (property_name=property_value, ...)`\r\n\r\nAnother PR will be submitted to handle the unsupported commands. In the Database-related DDL commands, we will issue an error exception for `ALTER (DATABASE|SCHEMA) database_name SET OWNER [USER|ROLE] user_or_role`.\r\n\r\ncc @yhuai @andrewor14 @rxin Could you review the changes? Is it in the right direction? Thanks!\r\n\r\n#### How was this patch tested?\r\nAdded a few test cases in `command/DDLSuite.scala` for testing DDL command execution in `SQLContext`. Since `HiveContext` also shares the same implementation, the existing test cases in `\\hive` also verifies the correctness of these 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