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https://issues.apache.org/jira/browse/CALCITE-3825?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jesus Camacho Rodriguez reopened CALCITE-3825:
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> Split AbstractMaterializedViewRule into multiple classes
> --------------------------------------------------------
>
>                 Key: CALCITE-3825
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3825
>             Project: Calcite
>          Issue Type: Improvement
>          Components: core
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.23.0
>
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> AbstractMaterializedViewRule contains a materialized view-based rewriting 
> algorithm that has been there for multiple releases and it is used by some 
> engines relying in Calcite, e.g., Apache Hive.
> The main reason to have a single file/class for the rule was to make the 
> logic self-contained instead of spreading it between multiple files from the 
> onset, as it was experimental and we were not sure how far the implementation 
> would go. In retrospective, we should have refactored that code sooner rather 
> than later, since it makes very difficult to understand and maintain logic 
> that is already complicated enough.
> This issue is to split AbstractMaterializedViewRule into multiple 
> files/classes (it already contained multiple internal classes).



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