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https://issues.apache.org/jira/browse/CALCITE-4155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17172997#comment-17172997
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Julian Hyde commented on CALCITE-4155:
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Could you perhaps revisit your patch in light of my guidance? You seem to have
invented a data structure that is similar to Guava's RangeSet. There may be
other improvements.
> Simplify IN expression of discrete values
> -----------------------------------------
>
> Key: CALCITE-4155
> URL: https://issues.apache.org/jira/browse/CALCITE-4155
> Project: Calcite
> Issue Type: New Feature
> Components: core
> Reporter: Liya Fan
> Assignee: Liya Fan
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> For example, given expressions like
> {{a in (1, 2, 3, 4, 5)}}
> or
> {{a = 1 or a = 2 or a = 3 or a = 4 or a = 5}},
> we can simplify it to
> {{a >= 1 and a <= 5}}
> Such simplification reduces the number of value comparisons from 5 to 2.
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