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https://issues.apache.org/jira/browse/CALCITE-2242?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16430403#comment-16430403
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Jesus Camacho Rodriguez commented on CALCITE-2242:
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[~julianhyde], my understanding is that it is because the new test generates
the plan using {{relBuilder}} instead of generating the plan from SQL as the
rest of the tests in {{RelOptRulesTest}}. If more tests did that, it would be
worth factoring that code and creating a new method that all of them would use.
> Using custom RelBuilder for FilterRemoveIsNotDistinctFromRule
> -------------------------------------------------------------
>
> Key: CALCITE-2242
> URL: https://issues.apache.org/jira/browse/CALCITE-2242
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.16.0
> Reporter: Vitalii Diravka
> Assignee: Vitalii Diravka
> Priority: Major
> Fix For: 1.17.0
>
>
> FilterRemoveIsNotDistinctFromRule doesn't leverage custom RelBuilder.
> There is no test case for this rule.
> {code}
> LogicalFilter(condition=[IS NOT DISTINCT FROM($7, 20)])
> LogicalTableScan(table=[[scott, EMP]])
> {code}
> -->
> {code}
> LogicalFilter(condition=[CASE(IS NULL($7), IS NULL(20), =(CAST($7):TINYINT
> NOT NULL, 20))])
> LogicalTableScan(table=[[scott, EMP]])
> {code}
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