{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/55117763","id":55117763,"diff_hunk":"@@ -78,6 +78,27 @@ class SQLBuilder(logicalPlan: LogicalPlan, sqlContext: SQLContext) extends Loggi\n     }\n   }\n \n+  private def toSQL(node: LogicalPlan, topNode: Boolean): String = {","path":"sql/hive/src/main/scala/org/apache/spark/sql/hive/SQLBuilder.scala","position":13,"original_position":13,"commit_id":"c8d9eeed56da34c739444838a9ff2020b9b00ad2","original_commit_id":"c8d9eeed56da34c739444838a9ff2020b9b00ad2","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":"Yea, looks like so. We only need to take care of Join for this purpose.","created_at":"2016-03-05T08:19:01Z","updated_at":"2016-03-05T08:19:01Z","html_url":"https://github.com/apache/spark/pull/11466#discussion_r55117763","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/11466","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/55117763"},"html":{"href":"https://github.com/apache/spark/pull/11466#discussion_r55117763"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/11466"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/11466","id":61370888,"html_url":"https://github.com/apache/spark/pull/11466","diff_url":"https://github.com/apache/spark/pull/11466.diff","patch_url":"https://github.com/apache/spark/pull/11466.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/11466","number":11466,"state":"closed","locked":false,"title":"[SPARK-13616][SQL] Let SQLBuilder convert logical plan without a project on top of it","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":"JIRA: https://issues.apache.org/jira/browse/SPARK-13616\r\n\r\n## What changes were proposed in this pull request?\r\n\r\nIt is possibly that a logical plan has been removed `Project` from the top of it. Or the plan doesn't has a top `Project` from the beginning because it is not necessary. Currently the `SQLBuilder` can't convert such plans back to SQL. This change is to add this feature.\r\n\r\n## How was this patch tested?\r\n\r\nA test is added to 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