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  1. Spark
  2. SPARK-34833

Apply right-padding correctly for correlated subqueries

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Blocker
    • Resolution: Fixed
    • Affects Version/s: 3.1.0, 3.1.1, 3.2.0
    • Fix Version/s: 3.1.2, 3.2.0
    • Component/s: SQL
    • Labels:

      Description

      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`.

      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|
      +---+
      +---+
      
      

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

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            • Assignee:
              maropu Takeshi Yamamuro
              Reporter:
              maropu Takeshi Yamamuro
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              • Created:
                Updated:
                Resolved: