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https://issues.apache.org/jira/browse/CALCITE-5814?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18047720#comment-18047720
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Zhen Chen commented on CALCITE-5814:
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Then we can temporarily not implement the simplification for MAP, and only
implement the simplification for ARRAY and MULTISET. If we want to consider MAP
simplification later, perhaps we can add a configuration parameter, such as
whether MAP supports ordering. What do you think?
> Simplify 'a = MAP[1,2] AND a = MAP[2,3]' to 'FALSE'
> ---------------------------------------------------
>
> Key: CALCITE-5814
> URL: https://issues.apache.org/jira/browse/CALCITE-5814
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.34.0
> Reporter: Runkang He
> Assignee: Runkang He
> Priority: Major
>
> Currently the following expression with const map literal is not simplified
> to FALSE:
> {code:sql}
> a = MAP[1,2] AND a = MAP[2,3]
> {code}
> Since the map type is an extension to the SQL standard, it's not clear
> whether it is comparable or not. If comparable, it would be nice to simplify
> above expression to FALSE.
> Welcome to discuss or provide some information.
> Note that this Jira is inspired from discussion of
> [CALCITE-5733|https://issues.apache.org/jira/browse/CALCITE-5733].
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