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https://issues.apache.org/jira/browse/CALCITE-3274?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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jin xing reassigned CALCITE-3274:
---------------------------------
Assignee: jin xing
> Add FilterOnProjectToFilterUnifyRule for materialization matching
> -----------------------------------------------------------------
>
> Key: CALCITE-3274
> URL: https://issues.apache.org/jira/browse/CALCITE-3274
> Project: Calcite
> Issue Type: Sub-task
> Components: core
> Reporter: jin xing
> Assignee: jin xing
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> With current implementation of MV matching, below case fails
> {code:java}
> @Test public void testFilterOnProject() {
> String deduplicated =
> "(select \"empid\", \"deptno\", \"name\", \"salary\",
> \"commission\"\n"
> + "from \"emps\"\n"
> + "group by \"empid\", \"deptno\", \"name\", \"salary\",
> \"commission\")";
> String mv =
> "select * from\n"
> + "(select \"deptno\", sum(\"salary\") as \"sum_salary\",
> sum(\"commission\")\n"
> + "from " + deduplicated + "\n"
> + "group by \"deptno\")\n"
> + "where \"sum_salary\" > 10";
> String query =
> "select * from\n"
> + "(select \"deptno\", sum(\"salary\") as \"sum_salary\"\n"
> + "from " + deduplicated + "\n"
> + "group by \"deptno\")\n"
> + "where \"sum_salary\" > 10";
> checkMaterialize(mv, query);
> }
> {code}
> {{Reason:}}
> After matching of the Aggregates, a compensating Project is added, but
> afterwards matching of filter fails to handle it.
> This issue proposes to handle such case where query and target are Filters
> and query has a compensating Project child node
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