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https://issues.apache.org/jira/browse/CALCITE-996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15032359#comment-15032359
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Julian Hyde commented on CALCITE-996:
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I concur with [~vlsi]'s review comment that we need a test case. It would help
me understand why you want this. I had thought that RelBuilder.filter was
already simplifying - but I now see that it is not. Why not make
RelBuilder.filter always simplify?
If you modify RelBuilder.filter, then a test case in RelBuilderTest will be
sufficient.
> FilterMergeRule should simplify the merged condition
> ----------------------------------------------------
>
> Key: CALCITE-996
> URL: https://issues.apache.org/jira/browse/CALCITE-996
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.5.0
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Fix For: 1.6.0
>
>
> When we call FilterMergeRule, there is a high probability that we end up with
> duplicate predicate factors. It seems appropriate to simplify the predicate
> to eliminate those factors before we create the merged filter.
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