Jackie-Jiang opened a new pull request, #15095:
URL: https://github.com/apache/pinot/pull/15095

   Main changes:
   - Move config constants in `InstancePlanMakerImplV2` and 
`SegmentPrunerConfig` into `CommonConstants`
   - Remove config wrapper `QueryExecutorConfig`
   - Rename the following config key to differentiate MSE and SSE:
     - `pinot.broker.enable.group.trim` -> `pinot.broker.mse.enable.group.trim`
     - `pinot.server.query.executor.group.trim.size` -> 
`pinot.server.query.executor.mse.min.group.trim.size`
   - Rename the following aggregate hint key to differentiate MSE and SSE:
     - `group_trim_size` -> `mse_min_group_trim_size`
   - Rename the following query option key to differentiate MSE and SSE:
     - `groupTrimSize` -> `mseMinGroupTrimSize`
   - Set default for `pinot.server.query.executor.mse.min.group.trim.size` to 
5000 (trim is still disabled by default)
   - Fix `AggregateOperator`:
     - Use `limit` as trim size when there is no order-by
     - Do not create priority queue with initial capacity of trim size because 
it could be very large


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