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https://issues.apache.org/jira/browse/CALCITE-2190?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16382981#comment-16382981
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Jesus Camacho Rodriguez commented on CALCITE-2190:
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I forgot to merge last commit addressing the comment about single element;
fixed in http://git-wip-us.apache.org/repos/asf/calcite/commit/483c0a61b .
> Extend SubstitutionVisitor.splitFilter to cover different order of operands
> ---------------------------------------------------------------------------
>
> Key: CALCITE-2190
> URL: https://issues.apache.org/jira/browse/CALCITE-2190
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Priority: Major
> Fix For: 1.16.0
>
>
> {{SubstitutionVisitor.splitFilter}} does structural comparison to identify
> relevant predicates. The method could sort the operands for some expressions
> in a deterministic way to maximize possible matches.
> For instance, currently this example yields correct results:
> {code}
> condition: x = 1 or y = 2
> target: y = 2 or x = 1
> -> residue: true
> {code}
> However, the following equivalent example fails:
> {code}
> condition: x = 1 or y = 2
> target: y = 2 or 1 = x
> {code}
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