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https://issues.apache.org/jira/browse/IGNITE-18464?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Evgeny Stanilovsky updated IGNITE-18464:
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Description:
For now requests like :
{noformat}
SELECT COUNT(DISTINCT val0) FROM test{noformat}
Can`t be planned through SortAggregates,
("ColocatedHashAggregateConverterRule", "MapReduceHashAggregateConverterRule",
"MapReduceSortAggregateConverterRule") - need to be disabled.
Plan with raw table without any additional indexes possibly can looks like :
{noformat}
IgniteProject
IgniteColocatedSortAggregate
IgniteExchange
IgniteSort (this sort is important here)
IgniteTableScan{noformat}
was:
For now requests like :
{noformat}
SELECT COUNT(DISTINCT val0) FROM test{noformat}
Can`t be planned through SortAggregates,
("ColocatedHashAggregateConverterRule", "MapReduceHashAggregateConverterRule",
"MapReduceSortAggregateConverterRule") - need to be disabled.
Plan with raw table without any additional indexes possibly can looks like :
{noformat}
IgniteProject
IgniteColocatedSortAggregate
IgniteExchange
IgniteSort (this sort is important here)
IgniteTableScan{noformat}
Seems map aggregate not require sorted input or smth about it.
> Sql. Colocated sort aggregates need to compose a plans with additional sort
> if no appropriate index is available.
> ------------------------------------------------------------------------------------------------------------------
>
> Key: IGNITE-18464
> URL: https://issues.apache.org/jira/browse/IGNITE-18464
> Project: Ignite
> Issue Type: Improvement
> Components: sql
> Affects Versions: 3.0.0-beta1
> Reporter: Evgeny Stanilovsky
> Assignee: Evgeny Stanilovsky
> Priority: Major
> Labels: calcite, ignite-3
>
> For now requests like :
> {noformat}
> SELECT COUNT(DISTINCT val0) FROM test{noformat}
> Can`t be planned through SortAggregates,
> ("ColocatedHashAggregateConverterRule",
> "MapReduceHashAggregateConverterRule", "MapReduceSortAggregateConverterRule")
> - need to be disabled.
> Plan with raw table without any additional indexes possibly can looks like :
> {noformat}
> IgniteProject
> IgniteColocatedSortAggregate
> IgniteExchange
> IgniteSort (this sort is important here)
> IgniteTableScan{noformat}
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