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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