[Fix](nereids) fix rule merge_aggregate when has project #33892
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TPC-H: Total hot run time: 38418 ms |
TPC-DS: Total hot run time: 183979 ms |
ClickBench: Total hot run time: 30.23 s |
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Load test result on machine: 'aliyun_ecs.c7a.8xlarge_32C64G' |
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TPC-H: Total hot run time: 38192 ms |
TPC-DS: Total hot run time: 185253 ms |
ClickBench: Total hot run time: 31.19 s |
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Load test result on machine: 'aliyun_ecs.c7a.8xlarge_32C64G' |
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TPC-H: Total hot run time: 39290 ms |
TPC-DS: Total hot run time: 184504 ms |
ClickBench: Total hot run time: 30.67 s |
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morrySnow
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Apr 24, 2024
| topDown(new EliminateGroupBy(), | ||
| new MergeAggregate()) | ||
| new MergeAggregate(), | ||
| new AdjustAggregateNullableForEmptySet()) |
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add comment here to explain why need execute AdjustAggregateNullableForEmptySet after MergeAggregate
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This pr fix 2 problem of merge_aggregate:
1.The map innerAggExprIdToAggFunc key is the inner agg output agg func exprid, value is the Agg func. When a LogicalProject is between 2 agg, the outeragg func child refer to the project output, I forget to do the rewrite to make the outeragg func child refer to the inneragg output. This can lead to an incorrect judgment when determining whether the outer agg func child exists in the inner agg func outputs. This pr fix this bug.
2.When merging 2 sum/min/max, the outer agg group by key is empty, and the inner agg group by key is not empty, the nullable attribute need to be adjusted. Because the sum without group by key is always nullable, the sum with group by key nullable attribute determined by the sum child nullable attribute. This pr fix this bug.