[jira] [Created] (SPARK-37292) Removes outer join if it only has DISTINCT on streamed side with alias

["Yuming Wang (Jira)" <ji...@apache.org>]

Yuming Wang created SPARK-37292:
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             Summary: Removes outer join if it only has DISTINCT on streamed side with alias
                 Key: SPARK-37292
                 URL: https://issues.apache.org/jira/browse/SPARK-37292
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.3.0
            Reporter: Yuming Wang



{code:scala}
    spark.range(200L).selectExpr("id AS a").createTempView("t1")
    spark.range(300L).selectExpr("id AS b").createTempView("t2")
    spark.sql("SELECT DISTINCT a AS newAlias FROM t1 LEFT JOIN t2 ON a = b").explain(true)
{code}





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