gianm commented on code in PR #13506:
URL: https://github.com/apache/druid/pull/13506#discussion_r1127455895
##########
extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/kernel/GlobalSortMaxCountShuffleSpec.java:
##########
@@ -93,15 +110,26 @@ public Either<Long, ClusterByPartitions>
generatePartitions(
@Override
@JsonProperty
- public ClusterBy getClusterBy()
+ public ClusterBy clusterBy()
{
return clusterBy;
}
- @JsonProperty
- int getPartitions()
+ @Override
+ public int partitionCount()
+ {
+ if (maxPartitions == 1) {
+ return maxPartitions;
+ } else {
+ // Number of actual partitions may be less than maxPartitions.
+ throw new IllegalStateException("Number of partitions not known.");
+ }
+ }
Review Comment:
Ah, this method is never actually called, because we never need to know the
partition count ahead of time for global-sort shuffle specs. This is a relic of
a past version of the patch where global-sort with maxPartitions = 1 was a way
of encoding "mix everything into a single partition". Now, there's an explicit
"mix" spec, so this isn't needed any longer.
I replaced the entire thing with a `throw`.
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