adarshsanjeev commented on code in PR #15953:
URL: https://github.com/apache/druid/pull/15953#discussion_r1538635316
##########
extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/querykit/results/ExportResultsFrameProcessorFactory.java:
##########
@@ -127,11 +139,46 @@ public ProcessorsAndChannels<Object, Long> makeProcessors(
);
return new ProcessorsAndChannels<>(
- ProcessorManagers.of(processors),
+ ProcessorManagers.of(processors)
+ .withAccumulation(new ArrayList<String>(), (acc,
file) -> {
+ ((ArrayList<String>) acc).add((String) file);
+ return acc;
+ }),
OutputChannels.none()
);
}
+ @Nullable
+ @Override
+ public TypeReference<Object> getResultTypeReference()
+ {
+ return new TypeReference<Object>() {};
+ }
+
+ @Override
+ public Object mergeAccumulatedResult(Object accumulated, Object
otherAccumulated)
+ {
+ // Maintain upgrade compatibility, if a worker does not return a list,
ignore it.
Review Comment:
Changed to throw an exception
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