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https://issues.apache.org/jira/browse/CALCITE-3334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16926052#comment-16926052
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Julian Hyde commented on CALCITE-3334:
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[~jcamachorodriguez], [~swtalbot] FYI.
> Refinement for Substitution-Based MV Matching
> ---------------------------------------------
>
> Key: CALCITE-3334
> URL: https://issues.apache.org/jira/browse/CALCITE-3334
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: jin xing
> Priority: Major
>
> The approach of substitution-based MV matching is an effective way for its
> simplicity and extensibility.
> This JIRA proposes to refine existing implementation by several points:
> # Canonicalize before MV matching -- by such canonicalization we can
> significantly simplify the algebra tree and lower the difficulty for
> materialization matching.
> # Separate matching rules into two categories and enumerate common matching
> patterns which need to be covered by rules.
> Please check the design doc: [Design
> Doc|https://docs.google.com/document/d/1JpwGNFE3hw3yXb7W3-95-jXKClZC5UFPKbuhgYDuEu4/edit#]
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