Jackie-Jiang commented on code in PR #11630:
URL: https://github.com/apache/pinot/pull/11630#discussion_r1331949272
##########
pinot-query-planner/src/main/java/org/apache/pinot/query/planner/physical/colocated/GreedyShuffleRewriteVisitor.java:
##########
@@ -190,23 +191,24 @@ public Set<ColocationKey>
visitMailboxReceive(MailboxReceiveNode node, GreedyShu
// distribution.
((MailboxSendNode)
node.getSender()).setDistributionType(RelDistribution.Type.SINGLETON);
return oldColocationKeys;
- } else if (selector == null) {
+ } else if (distributionKeys == null) {
return new HashSet<>();
}
// This means we can't skip shuffle and there's a partitioning enforced by
receiver.
int numPartitions = new HashSet<>(
_dispatchablePlanMetadataMap.get(node.getPlanFragmentId()).getWorkerIdToServerInstanceMap().values()).size();
- List<ColocationKey> colocationKeys = ((FieldSelectionKeySelector)
selector).getColumnIndices().stream()
- .map(x -> new ColocationKey(x, numPartitions,
selector.hashAlgorithm())).collect(Collectors.toList());
+ List<ColocationKey> colocationKeys =
+ distributionKeys.stream().map(x -> new ColocationKey(x, numPartitions,
KeySelector.DEFAULT_HASH_ALGORITHM))
Review Comment:
This optimizer is triggered by a hint, and we are not using it. I believe
the long term plan is to remove it. cc @walterddr
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