[jira] [Created] (FLINK-22148) Planner rules should use RexCall#equsls to check whether two rexCalls are equivalent

[Shang Yuanchun (Jira)]

Shuo Cheng created FLINK-22148:
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             Summary: Planner rules should use RexCall#equsls to check whether two rexCalls are equivalent
                 Key: FLINK-22148
                 URL: https://issues.apache.org/jira/browse/FLINK-22148
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Planner
    Affects Versions: 1.12.2
            Reporter: Shuo Cheng
             Fix For: 1.13.0


Reproduce the bug by add the following test to `SemiAntiJoinTest`

 
{code:java}
// code placeholder
@Test
def testNotSimplifyJoinConditionWithSameDigest(): Unit = {
  val sqlQuery =
  """
    |SELECT a
    |FROM l
    |WHERE c NOT IN (
    |    SELECT f FROM r WHERE f = c)
    |""".stripMargin
  util.verifyRelPlan(sqlQuery)
}
{code}
 

CannotPlanException will be thrown, this is because Calcite planner will normalize a RexCall in the `equals` method (from 1.24), while in Flink planer rules, we still use toString to check two RexCalls are equivalent.



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