{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/43469995","id":43469995,"diff_hunk":"@@ -417,6 +417,11 @@ object NullPropagation extends Rule[LogicalPlan] {\n         case left :: Literal(null, _) :: Nil => Literal.create(null, e.dataType)\n         case _ => e\n       }\n+\n+      // If the value expression is NULL then transform the In expression to\n+      // Literal(null)\n+      case In(Literal(null, _), list) => Literal.create(null, BooleanType)","path":"sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala","position":7,"original_position":7,"commit_id":"b1db88b0468e9b0be9aee37a749335f3e1fd5b80","original_commit_id":"b1db88b0468e9b0be9aee37a749335f3e1fd5b80","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":"For someone read this PR in the future:  we don't need to handle `InSet` here, because `InSet` requires `list` expressions are all literals, so if the `value` expression is null literal, the whole `InSet` is foldable and will be optimized into literal null.","created_at":"2015-10-30T03:58:56Z","updated_at":"2015-10-30T03:58:56Z","html_url":"https://github.com/apache/spark/pull/9348#discussion_r43469995","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/9348","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/43469995"},"html":{"href":"https://github.com/apache/spark/pull/9348#discussion_r43469995"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/9348"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/9348","id":49100377,"html_url":"https://github.com/apache/spark/pull/9348","diff_url":"https://github.com/apache/spark/pull/9348.diff","patch_url":"https://github.com/apache/spark/pull/9348.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/9348","number":9348,"state":"open","locked":false,"title":"[SPARK-11024][SQL] Optimize NULL in <inlist-expressions> by folding it to Literal(null)","user":{"login":"dilipbiswal","id":14225158,"avatar_url":"https://avatars.githubusercontent.com/u/14225158?v=3","gravatar_id":"","url":"https://api.github.com/users/dilipbiswal","html_url":"https://github.com/dilipbiswal","followers_url":"https://api.github.com/users/dilipbiswal/followers","following_url":"https://api.github.com/users/dilipbiswal/following{/other_user}","gists_url":"https://api.github.com/users/dilipbiswal/gists{/gist_id}","starred_url":"https://api.github.com/users/dilipbiswal/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dilipbiswal/subscriptions","organizations_url":"https://api.github.com/users/dilipbiswal/orgs","repos_url":"https://api.github.com/users/dilipbiswal/repos","events_url":"https://api.github.com/users/dilipbiswal/events{/privacy}","received_events_url":"https://api.github.com/users/dilipbiswal/received_events","type":"User","site_admin":false},"body":"Add a rule in optimizer to convert NULL [NOT] IN (expr1,...,expr2) to\r\nLiteral(null).\r\n\r\nThis is a follow up defect to SPARK-8654\r\n\r\n@cloud-fan Can you please take a look 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