[jira] [Updated] (CALCITE-2857) Complicated plan generated for subuqery with both equi and non-equi condition

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

     [ https://issues.apache.org/jira/browse/CALCITE-2857?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Haisheng Yuan updated CALCITE-2857:
-----------------------------------
    Summary: Complicated plan generated for subuqery with both equi and non-equi condition  (was: SemiJoin extends Join directly instead of EquiJoin to support non-equi condition)

> Complicated plan generated for subuqery with both equi and non-equi condition
> -----------------------------------------------------------------------------
>
>                 Key: CALCITE-2857
>                 URL: https://issues.apache.org/jira/browse/CALCITE-2857
>             Project: Calcite
>          Issue Type: Improvement
>          Components: core
>            Reporter: godfrey he
>            Priority: Major
>              Labels: sub-query
>
> SemiJoin extends Join directly instead of EquiJoin to support non-equi condition, 
>  e.g.
> {code:sql}
> select * from (select * from dept where dept.deptno in (select emp.deptno from emp where emp.job <> dept.name))R where R.deptno <= 10
> {code}
> Currently, this query will be converted to
> {code}
> SemiJoin(condition=[AND(=($1, $3), =($0, $2))], joinType=[inner])
>   LogicalFilter(condition=[<=($0, 10)])
>     LogicalTableScan(table=[[CATALOG, SALES, DEPT]])
>   LogicalProject(DEPTNO=[$7], NAME=[$9])
>     LogicalJoin(condition=[<>($2, $9)], joinType=[inner])
>       LogicalTableScan(table=[[CATALOG, SALES, EMP]])
>       LogicalAggregate(group=[{0}])
>         LogicalProject(NAME=[$1])
>           LogicalTableScan(table=[[CATALOG, SALES, DEPT]])
> {code}
> however the following plan is more efficient than the above one:
> {code}
> LogicalProject(DEPTNO=[$0], NAME=[$1])
>   LogicalFilter(condition=[<=($0, 10)])
>     SemiJoin(condition=[=AND(=($0, $3), <>($1, $2))], joinType=[inner])
>       LogicalTableScan(table=[[CATALOG, SALES, DEPT]])
>       LogicalProject(JOB=[$2], DEPTNO=[$7])
>         LogicalTableScan(table=[[CATALOG, SALES, EMP]])
> {code}



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