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Posted to issues@calcite.apache.org by "Jiatao Tao (Jira)" <ji...@apache.org> on 2020/11/23 06:34:00 UTC
[jira] [Comment Edited] (CALCITE-4413) Duplicate RAND() after
pushdown when optimizing
[ https://issues.apache.org/jira/browse/CALCITE-4413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17237146#comment-17237146 ]
Jiatao Tao edited comment on CALCITE-4413 at 11/23/20, 6:33 AM:
----------------------------------------------------------------
Thanks for your advice [~danny0405] :)
was (Author: aron.tao):
Thanks [~danny0405]
> Duplicate RAND() after pushdown when optimizing
> -----------------------------------------------
>
> Key: CALCITE-4413
> URL: https://issues.apache.org/jira/browse/CALCITE-4413
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Jiatao Tao
> Assignee: Jiatao Tao
> Priority: Major
>
> In CsvTest:
> SQL:
> {code:java}
> select *
> from
> (
> select empno, rand(1) as ran
> from EMPS
> where gender <> 'M'
> ) t
> where ran > 0.6
> {code}
>
> PLAN:
> {code:java}
> EnumerableProject(EMPNO=[$0], RAN=[RAND(1)])
> EnumerableInterpreter
> BindableTableScan(table=[[SALES, EMPS]], filters=[[AND(<>($3, 'M'), >(RAND(1), 0.6:DECIMAL(2, 1)))]])
> {code}
> We can see there are two "RAND(1)" and it changes the semantics.
>
>
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