[jira] [Created] (CALCITE-2948) SqlToRelConverter generates complicated logical plan for subquery

["Haisheng Yuan (JIRA)" <ji...@apache.org>]

Haisheng Yuan created CALCITE-2948:
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             Summary: SqlToRelConverter generates complicated logical plan for subquery
                 Key: CALCITE-2948
                 URL: https://issues.apache.org/jira/browse/CALCITE-2948
             Project: Calcite
          Issue Type: Bug
          Components: core
            Reporter: Haisheng Yuan


Repro:
Add the following test to SqlToRelConverterTest.java.

{code:java}
@Test public void testSubQueryIN() {
    final String sql = "select deptno\n"
        + "from EMP e\n"
        + "where deptno in (select deptno\n"
        + "from EMP where empno=e.empno+1)";
    sql(sql).ok();
  }
{code}

Plan:
{code:java}
LogicalProject(DEPTNO=[$7])
  LogicalJoin(condition=[AND(=($0, $10), =($7, $9))], joinType=[inner])
    LogicalTableScan(table=[[CATALOG, SALES, EMP]])
    LogicalAggregate(group=[{0, 1}])
      LogicalProject(DEPTNO=[$7], EMPNO0=[$9])
        LogicalJoin(condition=[=($0, +($9, 1))], joinType=[inner])
          LogicalTableScan(table=[[CATALOG, SALES, EMP]])
          LogicalProject(EMPNO=[$0])
            LogicalTableScan(table=[[CATALOG, SALES, EMP]])
{code}

One join would suffice.




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