somandal commented on code in PR #10845:
URL: https://github.com/apache/pinot/pull/10845#discussion_r1230366679
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pinot-query-planner/src/main/java/org/apache/calcite/rel/hint/PinotHintStrategyTable.java:
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@@ -29,6 +29,9 @@
public class PinotHintStrategyTable {
public static final String INTERNAL_AGG_INTERMEDIATE_STAGE =
"aggIntermediateStage";
public static final String INTERNAL_AGG_FINAL_STAGE = "aggFinalStage";
+ // Hint to denote that aggregation is to be run as a single stage rather
than split into an intermediate and a final
+ // stage
+ public static final String INTERNAL_IS_SINGLE_STAGE_AGG = "isSingleStageAgg";
Review Comment:
@walterddr this will make more sense once you look at this PR:
https://github.com/apache/pinot/pull/10846
We cannot leverage the final stage hint because we need to differentiate
between the intermediate stage actually running in the v1 engine as a leaf
stage vs. intermediate stage running in the v2 engine after performing
operations such as JOIN (agg on top of join vs. agg in leaf)
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