{"action":"opened","number":15682,"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/15682","id":91505223,"html_url":"https://github.com/apache/spark/pull/15682","diff_url":"https://github.com/apache/spark/pull/15682.diff","patch_url":"https://github.com/apache/spark/pull/15682.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/15682","number":15682,"state":"open","locked":false,"title":"[SPARK-18169][SQL] Suppress warnings when dropping views on a dropped table","user":{"login":"dongjoon-hyun","id":9700541,"avatar_url":"https://avatars.githubusercontent.com/u/9700541?v=3","gravatar_id":"","url":"https://api.github.com/users/dongjoon-hyun","html_url":"https://github.com/dongjoon-hyun","followers_url":"https://api.github.com/users/dongjoon-hyun/followers","following_url":"https://api.github.com/users/dongjoon-hyun/following{/other_user}","gists_url":"https://api.github.com/users/dongjoon-hyun/gists{/gist_id}","starred_url":"https://api.github.com/users/dongjoon-hyun/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dongjoon-hyun/subscriptions","organizations_url":"https://api.github.com/users/dongjoon-hyun/orgs","repos_url":"https://api.github.com/users/dongjoon-hyun/repos","events_url":"https://api.github.com/users/dongjoon-hyun/events{/privacy}","received_events_url":"https://api.github.com/users/dongjoon-hyun/received_events","type":"User","site_admin":false},"body":"## What changes were proposed in this pull request?\r\n\r\nApache Spark 2.0.0 ~ 2.0.2-rc1 shows an *AnalysisException* warning message when dropping a *view* on a dropped table. This does not happen on dropping *temporary views*. Also, Spark 1.6.x does not show warnings. We had better suppress this to be more consistent in Spark 2.x and with Spark 1.6.x.\r\n\r\n```scala\r\nscala> sql(\"create table t(a int)\")\r\n\r\nscala> sql(\"create view v as select * from t\")\r\n\r\nscala> sql(\"create temporary view tv as select * from t\")\r\n\r\nscala> sql(\"drop table t\")\r\n\r\nscala> sql(\"drop view tv\")\r\n\r\nscala> sql(\"drop view v\")\r\n16/10/29 15:50:03 WARN DropTableCommand: org.apache.spark.sql.AnalysisException: Table or view not found: `default`.`t`; line 1 pos 91;\r\n'SubqueryAlias v, `default`.`v`\r\n+- 'Project ['gen_attr_0 AS a#19]\r\n   +- 'SubqueryAlias t\r\n      +- 'Project ['gen_attr_0]\r\n         +- 'SubqueryAlias gen_subquery_0\r\n            +- 'Project ['a AS gen_attr_0#18]\r\n               +- 'UnresolvedRelation `default`.`t`\r\n\r\norg.apache.spark.sql.AnalysisException: Table or view not found: `default`.`t`; line 1 pos 91;\r\n'SubqueryAlias v, `default`.`v`\r\n+- 'Project ['gen_attr_0 AS a#19]\r\n   +- 'SubqueryAlias t\r\n      +- 'Project ['gen_attr_0]\r\n         +- 'SubqueryAlias gen_subquery_0\r\n            +- 'Project ['a AS gen_attr_0#18]\r\n               +- 'UnresolvedRelation `default`.`t`\r\n...\r\nres5: org.apache.spark.sql.DataFrame = []\r\n```\r\n\r\nNote that this is different case of dropping non-exist views. For those cases, Spark raises **NoSuchTableException**.\r\n\r\n## How was this patch tested?\r\n\r\nManual because this is a suppression of warning message.","created_at":"2016-10-29T23:14:48Z","updated_at":"2016-10-29T23:14:48Z","closed_at":null,"merged_at":null,"merge_commit_sha":null,"assignee":null,"assignees":[],"milestone":null,"commits_url":"https://api.github.com/repos/apache/spark/pulls/15682/commits","review_comments_url":"https://api.github.com/repos/apache/spark/pulls/15682/comments","review_comment_url":"https://api.github.com/repos/apache/spark/pulls/comments{/number}","comments_url":"https://api.github.com/repos/apache/spark/issues/15682/comments","statuses_url":"https://api.github.com/repos/apache/spark/statuses/9145c60c4be1b72d93d7176441248c122f518316","head":{"label":"dongjoon-hyun:SPARK-18169","ref":"SPARK-18169","sha":"9145c60c4be1b72d93d7176441248c122f518316","user":{"login":"dongjoon-hyun","id":9700541,"avatar_url":"https://avatars.githubusercontent.com/u/9700541?v=3","gravatar_id":"","url":"https://api.github.com/users/dongjoon-hyun","html_url":"https://github.com/dongjoon-hyun","followers_url":"https://api.github.com/users/dongjoon-hyun/followers","following_url":"https://api.github.com/users/dongjoon-hyun/following{/other_user}","gists_url":"https://api.github.com/users/dongjoon-hyun/gists{/gist_id}","starred_url":"https://api.github.com/users/dongjoon-hyun/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dongjoon-hyun/subscriptions","organizations_url":"https://api.github.com/users/dongjoon-hyun/orgs","repos_url":"https://api.github.com/users/dongjoon-hyun/repos","events_url":"https://api.github.com/users/dongjoon-hyun/events{/privacy}","received_events_url":"https://api.github.com/users/dongjoon-hyun/received_events","type":"User","site_admin":false},"repo":{"id":28900400,"name":"spark","full_name":"dongjoon-hyun/spark","owner":{"login":"dongjoon-hyun","id":9700541,"avatar_url":"https://avatars.githubusercontent.com/u/9700541?v=3","gravatar_id":"","url":"https://api.github.com/users/dongjoon-hyun","html_url":"https://github.com/dongjoon-hyun","followers_url":"https://api.github.com/users/dongjoon-hyun/followers","following_url":"https://api.github.com/users/dongjoon-hyun/following{/other_user}","gists_url":"https://api.github.com/users/dongjoon-hyun/gists{/gist_id}","starred_url":"https://api.github.com/users/dongjoon-hyun/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dongjoon-hyun/subscriptions","organizations_url":"https://api.github.com/users/dongjoon-hyun/orgs","repos_url":"https://api.github.com/users/dongjoon-hyun/repos","events_url":"https://api.github.com/users/dongjoon-hyun/events{/privacy}","received_events_url":"https://api.github.com/users/dongjoon-hyun/received_events","type":"User","site_admin":false},"private":false,"html_url":"https://github.com/dongjoon-hyun/spark","description":"Mirror 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