{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/48517137","id":48517137,"diff_hunk":"@@ -62,6 +62,10 @@ case class LocalRelation(output: Seq[Attribute], data: Seq[InternalRow] = Nil)\n     case _ => false\n   }\n \n+  override def simpleString: String =\n+    if (data == Seq.empty) super.simpleString + \" [Empty Seq]\"","path":"sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LocalRelation.scala","position":5,"original_position":5,"commit_id":"21080afd995e3df141db1531c065ace6eac4fa77","original_commit_id":"21080afd995e3df141db1531c065ace6eac4fa77","user":{"login":"cloud-fan","id":3182036,"avatar_url":"https://avatars.githubusercontent.com/u/3182036?v=3","gravatar_id":"","url":"https://api.github.com/users/cloud-fan","html_url":"https://github.com/cloud-fan","followers_url":"https://api.github.com/users/cloud-fan/followers","following_url":"https://api.github.com/users/cloud-fan/following{/other_user}","gists_url":"https://api.github.com/users/cloud-fan/gists{/gist_id}","starred_url":"https://api.github.com/users/cloud-fan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cloud-fan/subscriptions","organizations_url":"https://api.github.com/users/cloud-fan/orgs","repos_url":"https://api.github.com/users/cloud-fan/repos","events_url":"https://api.github.com/users/cloud-fan/events{/privacy}","received_events_url":"https://api.github.com/users/cloud-fan/received_events","type":"User","site_admin":false},"body":"should be https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/trees/TreeNode.scala#L401","created_at":"2015-12-29T01:33:22Z","updated_at":"2015-12-29T01:33:22Z","html_url":"https://github.com/apache/spark/pull/10494#discussion_r48517137","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/10494","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/48517137"},"html":{"href":"https://github.com/apache/spark/pull/10494#discussion_r48517137"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/10494"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/10494","id":54639499,"html_url":"https://github.com/apache/spark/pull/10494","diff_url":"https://github.com/apache/spark/pull/10494.diff","patch_url":"https://github.com/apache/spark/pull/10494.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/10494","number":10494,"state":"open","locked":false,"title":"[SPARK-12536] [SQL] Added \"Empty Seq\" in Explain Outputs For Empty LocalRelation and LocalTableScan","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":"The filter `Filter (False)` generates an empty `LocalRelation` in `SimplifyFilters`. In the current `Explain`, the optimized and physical plans look confusing. \r\n\r\nFor example,\r\n```scala\r\nval df = Seq(1 -> \"a\").toDF(\"a\", \"b\")\r\ndf.where(\"1 = 0\").explain(true)\r\n```\r\n```\r\n== Analyzed Logical Plan ==\r\na: int, b: string\r\nFilter (1 = 0)\r\n+- Project [_1#0 AS a#2,_2#1 AS b#3]\r\n   +- LocalRelation [_1#0,_2#1], [[1,a]]\r\n\r\n== Optimized Logical Plan ==\r\nLocalRelation [a#2,b#3] \r\n\r\n== Physical Plan ==\r\nLocalTableScan [a#2,b#3] \r\n```\r\n\r\nAfter the fix, the Optimized Logical Plan and Physical Plan are changed to\r\n```\r\n== Optimized Logical Plan ==\r\nLocalRelation [a#2,b#3][Empty Seq]\r\n\r\n== Physical Plan ==\r\nLocalTableScan [a#2,b#3][Empty Seq] 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