younggyuchun edited a comment on issue #25195: [SPARK-28288][SQL][PYTHON][TESTS] Convert and port 'window.sql' into … URL: https://github.com/apache/spark/pull/25195#issuecomment-513079590 @HyukjinKwon The reason is that I specified the "ORDER BY val"?: Before: `SELECT val, cate, row_number() OVER(PARTITION BY cate) FROM testData ORDER BY cate, val;` After: `SELECT udf(val), cate, row_number() OVER(PARTITION BY cate ORDER BY val) FROM testData ORDER BY cate, udf(val)` I guess we shouldn't specify "ORDER BY val" here right?
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