gortiz commented on code in PR #14495:
URL: https://github.com/apache/pinot/pull/14495#discussion_r1850587411
##########
pinot-query-planner/src/main/java/org/apache/pinot/query/planner/plannode/MailboxSendNode.java:
##########
@@ -50,8 +53,42 @@ public MailboxSendNode(int stageId, DataSchema dataSchema,
List<PlanNode> inputs
_sort = sort;
}
+ public MailboxSendNode(int stageId, DataSchema dataSchema, List<PlanNode>
inputs,
+ int receiverStage, PinotRelExchangeType exchangeType,
+ RelDistribution.Type distributionType, @Nullable List<Integer> keys,
boolean prePartitioned,
+ @Nullable List<RelFieldCollation> collations, boolean sort) {
+ this(stageId, dataSchema, inputs, toBitSet(receiverStage), exchangeType,
distributionType, keys, prePartitioned,
+ collations, sort);
+ }
+
+ private static BitSet toBitSet(int receiverStage) {
+ BitSet bitSet = new BitSet(receiverStage + 1);
+ bitSet.set(receiverStage);
+ return bitSet;
+ }
+
+ public MailboxSendNode(int stageId, DataSchema dataSchema, List<PlanNode>
inputs,
+ PinotRelExchangeType exchangeType, RelDistribution.Type
distributionType, @Nullable List<Integer> keys,
+ boolean prePartitioned, @Nullable List<RelFieldCollation> collations,
boolean sort) {
+ this(stageId, dataSchema, inputs, null, exchangeType, distributionType,
keys, prePartitioned, collations, sort);
+ }
+
+ public BitSet getReceiverStages() {
+ Preconditions.checkState(!_receiverStages.isEmpty(), "Receivers not set");
+ return (BitSet) _receiverStages.clone();
+ }
Review Comment:
Oh! I misread you. I though the code wasn't returning a copy and you wanted
to say that the returned BitSet should not be modified.
About your actual comment: I don't think that needs to be commented.
Specifically, I think that should be the default. Even if we don't do defensive
copies, by default we should never modify structures returned by objects. It is
a bit like annotating with `@NotNull`. In the same way we assume that
everything is not nullable by default, we should assume we should not change
mutable properties by default.
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