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https://issues.apache.org/jira/browse/CALCITE-4734?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Wang Yanlin resolved CALCITE-4734.
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Resolution: Fixed
> Materialization-Failed, when meeting same projs in mv.
> ------------------------------------------------------
>
> Key: CALCITE-4734
> URL: https://issues.apache.org/jira/browse/CALCITE-4734
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Xurenhe
> Priority: Critical
> Labels: pull-request-available
> Attachments: image-2021-08-13-11-43-54-035.png,
> image-2021-08-13-11-44-09-504.png
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> Some user may define some not beautiful mv, but these mv should be worked for
> rewriting query.
> For example:
> {code:java}
> @Test void testMoreSameExprInMv() {
> final String mv = ""
> + "select \"empid\", \"deptno\", sum(\"empid\") as s1, sum(\"empid\")
> as s2, count(*) as c\n"
> + "from \"emps\" group by \"empid\", \"deptno\"";
> final String query = ""
> + "select sum(\"empid\"), count(*) from \"emps\" group by \"empid\",
> \"deptno\"";
> sql(mv, query).ok();
> }
> {code}
> I try debug code to solve this problem.
> I find some bug in
> {code:java}
> org.apache.calcite.plan.SubstitutionVisitor#getRexShuttle
> {code}
> !image-2021-08-13-11-43-54-035.png|thumbnail!
> !image-2021-08-13-11-44-09-504.png|thumbnail!
> PR: https://github.com/apache/calcite/pull/2484
> Please review, THX.
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