{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/38219598","id":38219598,"diff_hunk":"@@ -145,46 +143,43 @@ case class ArrayContains(left: Expression, right: Expression)\n     }\n   }\n \n-  override def nullable: Boolean = false\n+  override def nullable: Boolean = {\n+    val dt = right.dataType\n+    left.nullable || dt.isInstanceOf[ArrayType] && dt.asInstanceOf[ArrayType].containsNull\n+  }","path":"sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala","position":19,"original_position":19,"commit_id":"5ca7823dea93b2341fdb2af6bf548812471ba48b","original_commit_id":"5ca7823dea93b2341fdb2af6bf548812471ba48b","user":{"login":"yhuai","id":2072857,"avatar_url":"https://avatars.githubusercontent.com/u/2072857?v=3","gravatar_id":"","url":"https://api.github.com/users/yhuai","html_url":"https://github.com/yhuai","followers_url":"https://api.github.com/users/yhuai/followers","following_url":"https://api.github.com/users/yhuai/following{/other_user}","gists_url":"https://api.github.com/users/yhuai/gists{/gist_id}","starred_url":"https://api.github.com/users/yhuai/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/yhuai/subscriptions","organizations_url":"https://api.github.com/users/yhuai/orgs","repos_url":"https://api.github.com/users/yhuai/repos","events_url":"https://api.github.com/users/yhuai/events{/privacy}","received_events_url":"https://api.github.com/users/yhuai/received_events","type":"User","site_admin":false},"body":"Looks like we need to swap `left` and `right`?","created_at":"2015-08-28T16:49:27Z","updated_at":"2015-08-28T16:49:27Z","html_url":"https://github.com/apache/spark/pull/8492#discussion_r38219598","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/8492","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/38219598"},"html":{"href":"https://github.com/apache/spark/pull/8492#discussion_r38219598"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/8492"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/8492","id":43581183,"html_url":"https://github.com/apache/spark/pull/8492","diff_url":"https://github.com/apache/spark/pull/8492.diff","patch_url":"https://github.com/apache/spark/pull/8492.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/8492","number":8492,"state":"open","locked":false,"title":"[SPARK-10323] [SQL] fix nullability of In/InSet/ArrayContain","user":{"login":"davies","id":40902,"avatar_url":"https://avatars.githubusercontent.com/u/40902?v=3","gravatar_id":"","url":"https://api.github.com/users/davies","html_url":"https://github.com/davies","followers_url":"https://api.github.com/users/davies/followers","following_url":"https://api.github.com/users/davies/following{/other_user}","gists_url":"https://api.github.com/users/davies/gists{/gist_id}","starred_url":"https://api.github.com/users/davies/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/davies/subscriptions","organizations_url":"https://api.github.com/users/davies/orgs","repos_url":"https://api.github.com/users/davies/repos","events_url":"https://api.github.com/users/davies/events{/privacy}","received_events_url":"https://api.github.com/users/davies/received_events","type":"User","site_admin":false},"body":"After this PR, In/InSet/ArrayContain will return null if value is null, instead of false. 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