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https://issues.apache.org/jira/browse/CALCITE-7373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18052145#comment-18052145
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Zhen Chen edited comment on CALCITE-7373 at 1/15/26 3:20 PM:
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Do we need to consider the pushdown in this scenario? That is, the case where
the condition containing rand() includes a join key.
{code:java}
select * from (
select dept.deptno from dept inner join
emp on dept.deptno = emp.deptno) R
where deptno <= rand() * 100; {code}
was (Author: jensen):
Do we need to consider the pushdown in this scenario? That is, the case where
the condition containing rand() includes a join key.
select * from (
select dept.deptno from dept inner join
emp on dept.deptno = emp.deptno) R
where deptno <= rand() * 100;
> FILTER_INTO_JOIN should not push Filter into a join when the Filter contains
> non-deterministic function
> -------------------------------------------------------------------------------------------------------
>
> Key: CALCITE-7373
> URL: https://issues.apache.org/jira/browse/CALCITE-7373
> Project: Calcite
> Issue Type: Bug
> Reporter: xiong duan
> Assignee: xiong duan
> Priority: Major
> Labels: pull-request-available
>
> The test in RelOptRulesTest:
> {code:java}
> <TestCase name="testPushFilterThroughSemiJoin5">
> <Resource name="sql">
> <![CDATA[select * from (
> select * from dept where dept.deptno in (
> select emp.deptno from emp))R
> where 0.9 <= RANDOM()]]>
> </Resource>
> <Resource name="planBefore">
> <![CDATA[
> LogicalProject(DEPTNO=[$0], NAME=[$1])
> LogicalFilter(condition=[<=(CAST(0.9:DECIMAL(2, 1)):DOUBLE NOT NULL,
> RANDOM())])
> LogicalJoin(condition=[=($0, $2)], joinType=[semi])
> LogicalTableScan(table=[[CATALOG, SALES, DEPT]])
> LogicalProject(DEPTNO=[$7])
> LogicalTableScan(table=[[CATALOG, SALES, EMP]])
> ]]>
> </Resource>
> <Resource name="planAfter">
> <![CDATA[
> LogicalProject(DEPTNO=[$0], NAME=[$1])
> LogicalJoin(condition=[=($0, $2)], joinType=[semi])
> LogicalFilter(condition=[<=(0.9E0, RANDOM())])
> LogicalTableScan(table=[[CATALOG, SALES, DEPT]])
> LogicalProject(DEPTNO=[$7])
> LogicalTableScan(table=[[CATALOG, SALES, EMP]])
> ]]>
> </Resource>
> </TestCase> {code}
> The Filter constains RANDOM() should not be push down.
>
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