KurtYoung commented on a change in pull request #7903: 
[FLINK-11822][table-planner-blink] Introduce Flink metadata handlers
URL: https://github.com/apache/flink/pull/7903#discussion_r278413302
 
 

 ##########
 File path: 
flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/plan/nodes/logical/FlinkLogicalAggregate.scala
 ##########
 @@ -161,7 +162,14 @@ object FlinkLogicalAggregate {
       groupSets: util.List[ImmutableBitSet],
       aggCalls: util.List[AggregateCall]): FlinkLogicalAggregate = {
     val cluster = input.getCluster
-    val traitSet = 
cluster.traitSet().replace(FlinkConventions.LOGICAL).simplify()
-    new FlinkLogicalAggregate(cluster, traitSet, input, indicator, groupSet, 
groupSets, aggCalls)
+    val traitSet = cluster.traitSetOf(Convention.NONE)
+    //FIXME: FlinkRelMdDistribution requires the current RelNode to compute
 
 Review comment:
   Do we have a follow-up of these FIXME? I noticed that you added tens of 
FIXMEs

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