englefly commented on code in PR #67433:
URL: https://github.com/apache/doris/pull/67433#discussion_r4475926252
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/glue/translator/PhysicalPlanTranslator.java:
##########
@@ -3386,6 +3405,301 @@ private PlanFragment connectJoinNode(HashJoinNode
hashJoinNode, PlanFragment lef
return leftFragment;
}
+ private PlanFragment connectGroupJoinNode(GroupJoinNode groupJoinNode,
PlanFragment leftFragment,
+ PlanFragment rightFragment, PlanTranslatorContext context,
AbstractPlan groupJoin) {
+ groupJoinNode.setChild(0, leftFragment.getPlanRoot());
+ groupJoinNode.setChild(1, rightFragment.getPlanRoot());
+ setPlanRoot(leftFragment, groupJoinNode, groupJoin);
+ context.mergePlanFragment(rightFragment, leftFragment);
+ for (PlanFragment rightChild : rightFragment.getChildren()) {
+ leftFragment.addChild(rightChild);
+ }
+ return leftFragment;
+ }
+
+ /**
+ * V2: Try to fuse HashAggregate(HashJoin) into GroupJoin directly in the
translator stage.
+ * <p>
+ * When the aggregate's child is an INNER hash join with compatible
group-by/join-key,
+ * generate a GroupJoinNode instead of separate AggregationNode +
HashJoinNode.
+ * Returns null if conditions are not met — caller falls through to normal
translation.
+ */
+ private PlanFragment maybeTranslateToGroupJoin(
+ Plan aggregate,
+ PlanTranslatorContext context) {
+ // Gate: session variable. Fusion requires the Nereids distribute
planner. The legacy
+ // Coordinator assigns fragments with BucketShuffleJoinController,
whose detector only
+ // recognizes HashJoinNode, so a fused BUCKET_SHUFFLE GroupJoin would
get generic scan
+ // assignment and then fail its bucket-shuffle sink check. Forcing the
legacy distributor
+ // therefore falls back to the ordinary hash join + aggregation plan.
+ ConnectContext connectContext = ConnectContext.get();
+ if (connectContext == null
Review Comment:
done
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