{"action":"closed","number":13241,"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/13241","id":70942506,"html_url":"https://github.com/apache/spark/pull/13241","diff_url":"https://github.com/apache/spark/pull/13241.diff","patch_url":"https://github.com/apache/spark/pull/13241.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/13241","number":13241,"state":"closed","locked":false,"title":"[SPARK-15462][SQL][TEST] `unresolved === false` is enough in testcases.","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\nIn only `catalyst` module, there exists 8 evaluation test cases on unresolved expressions. But, in real-world situation, those cases doesn't happen since they occurs exceptions before evaluations.\r\n```scala\r\nscala> sql(\"select format_number(null, 3)\")\r\nres0: org.apache.spark.sql.DataFrame = [format_number(CAST(NULL AS DOUBLE), 3): string]\r\nscala> sql(\"select format_number(cast(null as NULL), 3)\")\r\norg.apache.spark.sql.catalyst.parser.ParseException:\r\nDataType null() is not supported.(line 1, pos 34)\r\n```\r\n\r\nThis PR makes those testcases more realistic.\r\n```scala\r\n-    checkEvaluation(FormatNumber(Literal.create(null, NullType), Literal(3)), null)\r\n+    assert(FormatNumber(Literal.create(null, NullType), Literal(3)).resolved === false)\r\n```\r\nAlso, this PR also removes redundant `resolved` checking in `FoldablePropagation` optimizer.\r\n\r\n## How was this patch tested?\r\n\r\nPass the modified Jenkins 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