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https://issues.apache.org/jira/browse/CALCITE-3334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16925666#comment-16925666
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jin xing commented on CALCITE-3334:
-----------------------------------
I have a commit to illustrate the idea shown in the design doc:
[https://github.com/jinxing64/calcite/commit/dd8d7f15faa852641e19f42c51afade5bf7728f2]
In the commit, I replaced existing substitution-based rules by new defined
rules and passed all tests. Also I added several more test cases.
If this idea proposed is interested, I can split the this work into several
issues and submit implementations
> 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 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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