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Posted to issues@calcite.apache.org by "Wang Yanlin (Jira)" <ji...@apache.org> on 2020/11/22 12:12:00 UTC

[jira] [Updated] (CALCITE-4376) Materialized view recognition fails when target project different columns with GROUP BY

     [ https://issues.apache.org/jira/browse/CALCITE-4376?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wang Yanlin updated CALCITE-4376:
---------------------------------
    Summary: Materialized view recognition fails when target project different columns with GROUP BY  (was: Materialized view recognition fails when target project different column sequence with GROUP BY)

> Materialized view recognition fails when target project different columns with GROUP BY
> ---------------------------------------------------------------------------------------
>
>                 Key: CALCITE-4376
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4376
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: Wang Yanlin
>            Assignee: Wang Yanlin
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> When target project a different column sequence with group by, materialized view recognition will fail, see the case below
> {noformat}
> @Test void testDifferentGroupBySequence() {
>     final String mv = "" +
>         "select \"deptno\", \"name\" from ("
>         + "select \"name\", \"deptno\", \"commission\"\n"
>         + "from \"emps\"\n"
>         + " group by \"name\", \"deptno\", \"commission\") t";
>     final String query = ""
>         + "select \"deptno\", \"name\"\n"
>         + "from \"emps\"\n"
>         + "group by \"deptno\", \"name\"";
>     sql(mv, query).withChecker(
>         resultContains(""
>             + "EnumerableTableScan(table=[[hr, MV0]])")).ok();
>   }
> {noformat}



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