[jira] [Commented] (CALCITE-4805) The IN sub-query can't be converted to OR when value list contains Null.

["duan xiong (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-4805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17420284#comment-17420284 ] 

duan xiong commented on CALCITE-4805:
-------------------------------------

[~julianhyde] Hi. If you have free time, Please help review this. Thanks.

> The IN sub-query can't be converted to OR when value list contains Null.
> ------------------------------------------------------------------------
>
>                 Key: CALCITE-4805
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4805
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: duan xiong
>            Assignee: duan xiong
>            Priority: Major
>
> for example:
> {code:java}
> select * from emp where deptno in (null,2){code}
> Now the RelNode is:
> {code:java}
> LogicalProject(EMPNO=[$0], ENAME=[$1], JOB=[$2], MGR=[$3], HIREDATE=[$4], SAL=[$5], COMM=[$6], DEPTNO=[$7], SLACKER=[$8])
>  LogicalJoin(condition=[=($7, $9)], joinType=[inner])
>  LogicalTableScan(table=[[CATALOG, SALES, EMP]])
>  LogicalAggregate(group=[{0}])
>  LogicalValues(tuples=[[{ null }, { 2 }]]){code}
> The RelNode should be:
> {code:java}
> LogicalProject(EMPNO=[$0], ENAME=[$1], JOB=[$2], MGR=[$3], HIREDATE=[$4], SAL=[$5], COMM=[$6], DEPTNO=[$7], SLACKER=[$8])
>  LogicalFilter(condition=[OR(=($7, null), =($7, 2))])
>  LogicalTableScan(table=[[CATALOG, SALES, EMP]]){code}
> So I think when the sub-query value list size is under the threshold(IN_SUB_QUERY_THRESHOLD), they can be converted to OR(no matter have the NullLiteral or not). 



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