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Add late-bound materialized partition routing - #19483
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Codecov Report❌ Patch coverage is Additional details and impacted files@@ Coverage Diff @@
## master #19483 +/- ##
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+ Coverage 39.94% 68.39% +28.44%
- Complexity 1449 1450 +1
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Files 3520 3528 +8
Lines 228940 229926 +986
Branches 36313 36473 +160
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+ Hits 91453 157254 +65801
+ Misses 129215 60326 -68889
- Partials 8272 12346 +4074
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Introduce an opt-in file-backed HASH exchange that preserves the existing worker assignment. Producers materialize consumer-independent logical partitions, report exact output handles, and consumers fetch their static partition from every producer. The implementation includes atomic publication, cancellation-safe cleanup, bounded gRPC streaming with backpressure, output coverage validation, and planner/runtime/storage tests. Test Plan: - PinotDispatchPlannerTest, PlanNodeSerDeTest: 140 passed - materialized mailbox/runtime/dispatcher tests: 109 passed - spotless, checkstyle, and license checks passed for pinot-common, pinot-spi, pinot-query-planner, and pinot-query-runtime
Add an opt-in broker-owned dispatch graph that treats materialized exchanges as completion barriers while contracting streaming-connected stages into atomic dispatch groups. The broker dispatches only ready groups, waits for exact unique worker completion and stream closure, preserves assignments, and orders the local root stage under one absolute deadline. Test Plan: - StageDispatchGraphTest, StreamingQuerySessionTest, StreamingDispatchObserverTest, QueryDispatcherTest: 110 passed - spotless, checkstyle, and license checks passed for pinot-common, pinot-spi, and pinot-query-runtime
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wirybeaver#72