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https://issues.apache.org/jira/browse/CALCITE-4805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17422870#comment-17422870
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Julian Hyde edited comment on CALCITE-4805 at 9/30/21, 4:03 PM:
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Final review now. Will merge shortly.
was (Author: julianhyde):
Final review now. Still merge shortly.
> Calcite should convert a small IN-list as if the user had written OR, even if
> the IN-list contains NULL
> -------------------------------------------------------------------------------------------------------
>
> Key: CALCITE-4805
> URL: https://issues.apache.org/jira/browse/CALCITE-4805
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: duan xiong
> Assignee: duan xiong
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.28.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Since CALCITE-373 Calcite has converted "x IN (1, 2)" to "x = 1 OR x = 2" but
> it still converts "x IN (1, NULL)" to "x IN (VALUES 1, NULL)" and that, since
> some bugs have been fixed, there's no good reason for the difference.
> 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}
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