Description
Following query generates sub-optimal plan
explain plan for select * from scott.emp where deptno not in (select deptno from scott.dept where deptno = 20);
Following is the plan
EnumerableCalc(expr#0..11=[{inputs}], expr#12=[0], expr#13=[=($t8, $t12)], expr#14=[false], expr#15=[IS NOT NULL($t11)], expr#16=[true], expr#17=[IS NULL($t7)], expr#18=[null], expr#19=[<($t9, $t8)], expr#20=[CASE($t13, $t14, $t15, $t16, $t17, $t18, $t19, $t16, $t14)], expr#21=[NOT($t20)], proj#0..7=[{exprs}], $condition=[$t21])
EnumerableJoin(condition=[=($7, $10)], joinType=[left])
EnumerableCalc(expr#0..9=[{inputs}], EMPNO=[$t2], ENAME=[$t3], JOB=[$t4], MGR=[$t5], HIREDATE=[$t6], SAL=[$t7], COMM=[$t8], DEPTNO=[$t9], c=[$t0], ck=[$t1])
EnumerableJoin(condition=[true], joinType=[inner])
JdbcToEnumerableConverter
JdbcAggregate(group=[{}], c=[COUNT()], ck=[COUNT($0)])
JdbcFilter(condition=[=(CAST($0):INTEGER NOT NULL, 20)])
JdbcTableScan(table=[[SCOTT, DEPT]])
JdbcToEnumerableConverter
JdbcTableScan(table=[[SCOTT, EMP]])
JdbcToEnumerableConverter
JdbcAggregate(group=[{0, 1}])
JdbcProject(DEPTNO=[$0], i=[true])
JdbcFilter(condition=[=(CAST($0):INTEGER NOT NULL, 20)])
JdbcTableScan(table=[[SCOTT, DEPT]])
As Julian pointed out in discussion on mailing list instead of two scans for DEPT one is sufficient as clearly DEPTNO is never null.
Attachments
Issue Links
- relates to
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CALCITE-2071 Query with IN and OR in WHERE clause returns wrong result
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- Closed
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- links to