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https://issues.apache.org/jira/browse/IGNITE-12914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Roman Kondakov updated IGNITE-12914:
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Priority: Minor (was: Major)
> Calcite integration: Add aggregate project merge rule to the planner
> --------------------------------------------------------------------
>
> Key: IGNITE-12914
> URL: https://issues.apache.org/jira/browse/IGNITE-12914
> Project: Ignite
> Issue Type: Improvement
> Components: sql
> Reporter: Roman Kondakov
> Priority: Minor
>
> We need to add next rules to planner
> * AggregateProjectMergeRule
> In order to be able to make this transformation for the query:
> {noformat}
> "select x, sum(z), y from (\n"
> + " select deptno as x, empno as y, sal as z, sal * 2 as zz\n"
> + " from emp)\n"
> + "group by x, y"
> BEFORE=
> LogicalProject(X=[$0], EXPR$1=[$2], Y=[$1])
> LogicalAggregate(group=[{0, 1}], EXPR$1=[SUM($2)])
> LogicalProject(X=[$3], Y=[$0], Z=[$2])
> IgniteTableScan(table=[[PUBLIC, EMP]])
> AFTER=
> IgniteProject(X=[$0], EXPR$1=[$2], Y=[$1])
> IgniteProject(DEPTNO=[$1], EMPNO=[$0], EXPR$1=[$2])
> IgniteAggregate(group=[{0, 3}], EXPR$1=[SUM($2)])
> IgniteTableScan(table=[[PUBLIC, EMP]])
> {noformat}
>
>
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