arrow: support morsel driven parallelism for arrow tables#238
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arrow: support morsel driven parallelism for arrow tables#238
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- Use ColumnarNodeTableSharedState::getNextBatch() for thread-safe batch assignment - Add initArrowScanForBatch() helper method to fetch batches from shared state - Modify initScanState() to initialize from shared state - Update scanInternal() to fetch next batch when current is exhausted Each parallel scan thread now gets assigned full RecordBatches via the shared state, enabling parallel processing across multiple batches.
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- Add morsel tracking fields to ArrowNodeTableScanState (morselSize, start/end offsets) - Modify initArrowScanForBatch() to initialize morsel boundaries when assigning batches - Update scanInternal() to process only morsel-sized chunks (default: 2048 rows) - When morsels in a batch are exhausted, fetch next batch from shared state This enables parallel processing of large RecordBatches by dividing them into smaller morsels that can be processed by multiple threads concurrently.
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I would like propose some changes
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Related to: #183
Useful for multi-core machines.