[jira] [Created] (FLINK-12610) Introduce planner rules about aggregate

[Shang Yuanchun (Jira)]

godfrey he created FLINK-12610:
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             Summary: Introduce planner rules about aggregate
                 Key: FLINK-12610
                 URL: https://issues.apache.org/jira/browse/FLINK-12610
             Project: Flink
          Issue Type: New Feature
          Components: Table SQL / Planner
            Reporter: godfrey he
            Assignee: godfrey he


This issue aims to introduce planner rules about aggregate, rules include:
1. {{AggregateCalcMergeRule}}, that recognizes {{Aggregate}} on top of a {{Calc}} and if possible aggregate through the calc or removes the calc
2. {{AggregateReduceGroupingRule}}, that reduces unless grouping columns
3. {{PruneAggregateCallRule}}, that that removes unreferenced AggregateCall from Aggregate
4. {{FlinkAggregateRemoveRule}}, that is copied from Calcite's AggregateRemoveRule, and supports SUM, MIN, MAX, AUXILIARY_GROUP aggregate functions in non-empty group aggregate
5. {{FlinkAggregateJoinTransposeRule}}, that is copied from Calcite's AggregateJoinTransposeRule, and supports Left/Right outer join and aggregate with AUXILIARY_GROUP



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