[jira] [Created] (SPARK-34833) Apply right-padding correctly for correlated subqueries

["Takeshi Yamamuro (Jira)" <ji...@apache.org>]

Takeshi Yamamuro created SPARK-34833:
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             Summary: Apply right-padding correctly for correlated subqueries
                 Key: SPARK-34833
                 URL: https://issues.apache.org/jira/browse/SPARK-34833
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 3.2.0
            Reporter: Takeshi Yamamuro


This ticket aim at  fixing the bug that does not apply right-padding for char types inside correlated subquries.
For example,  a query below returns nothing in master, but a correct result is `c`.
{code}
scala> sql(s"CREATE TABLE t1(v VARCHAR(3), c CHAR(5)) USING parquet")
scala> sql(s"CREATE TABLE t2(v VARCHAR(5), c CHAR(7)) USING parquet")
scala> sql("INSERT INTO t1 VALUES ('c', 'b')")
scala> sql("INSERT INTO t2 VALUES ('a', 'b')")
scala> val df = sql("""
  |SELECT v FROM t1
  |WHERE 'a' IN (SELECT v FROM t2 WHERE t2.c = t1.c )""".stripMargin)

scala> df.show()
+---+
|  v|
+---+
+---+

{code}

This is because `ApplyCharTypePadding`  does not handle the case above to apply right-padding into `'abc'`. 



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