Zhen Chen created CALCITE-7000:
----------------------------------
Summary: Extend IntersectToSemiJoinRule to support n-way inputs
Key: CALCITE-7000
URL: https://issues.apache.org/jira/browse/CALCITE-7000
Project: Calcite
Issue Type: Improvement
Reporter: Zhen Chen
Assignee: Zhen Chen
SQL:
{code:java}
select ename from emp where deptno = 10
intersect
select ename from emp where deptno = 20
intersect
select ename from emp where deptno = 30 {code}
Plan before:
{code:java}
LogicalIntersect(all=[false])
LogicalProject(ENAME=[$1])
LogicalFilter(condition=[=($7, 10)])
LogicalTableScan(table=[[CATALOG, SALES, EMP]])
LogicalProject(ENAME=[$1])
LogicalFilter(condition=[=($7, 20)])
LogicalTableScan(table=[[CATALOG, SALES, EMP]])
LogicalProject(ENAME=[$1])
LogicalFilter(condition=[=($7, 30)])
LogicalTableScan(table=[[CATALOG, SALES, EMP]]) {code}
Plan after:
{code:java}
LogicalAggregate(group=[{0}])
LogicalJoin(condition=[IS NOT DISTINCT FROM($0, $1)], joinType=[semi])
LogicalJoin(condition=[IS NOT DISTINCT FROM($0, $1)], joinType=[semi])
LogicalProject(ENAME=[$1])
LogicalFilter(condition=[=($7, 10)])
LogicalTableScan(table=[[CATALOG, SALES, EMP]])
LogicalProject(ENAME=[$1])
LogicalFilter(condition=[=($7, 20)])
LogicalTableScan(table=[[CATALOG, SALES, EMP]])
LogicalProject(ENAME=[$1])
LogicalFilter(condition=[=($7, 30)])
LogicalTableScan(table=[[CATALOG, SALES, EMP]]) {code}
The number of inputs needs to be greater than 1.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
