gortiz commented on code in PR #17342:
URL: https://github.com/apache/pinot/pull/17342#discussion_r2618414662
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pinot-query-planner/src/main/java/org/apache/pinot/query/routing/WorkerManager.java:
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@@ -362,6 +362,10 @@ private List<QueryServerInstance>
getCandidateServers(DispatchablePlanContext co
} else {
candidateServers = getCandidateServersPerTables(context);
}
+ // Sort to ensure deterministic worker ID assignment across stages.
Review Comment:
> E.g. there is a JOIN over 2 sorted projection, where the planner
identifies both side as colocated
Why do we need an exchange in that case? Isn't that kind of exchange just a
noop? Couldn't we fuse these two stages?
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