Ensure an executor broadcast is in a single batch [databricks] #10660
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… of RequireSingleBatch Signed-off-by: Navin Kumar <navink@nvidia.com>
Signed-off-by: Navin Kumar <navink@nvidia.com>
NVnavkumar
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...main/spark330db/scala/org/apache/spark/sql/rapids/execution/GpuExecutorBroadcastHelper.scala
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...c/main/spark330db/scala/org/apache/spark/sql/rapids/execution/GpuBroadcastHashJoinExec.scala
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Signed-off-by: Navin Kumar <navink@nvidia.com>
Signed-off-by: Navin Kumar <navink@nvidia.com>
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...main/spark330db/scala/org/apache/spark/sql/rapids/execution/GpuExecutorBroadcastHelper.scala
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Signed-off-by: Navin Kumar <navink@nvidia.com>
NVnavkumar
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| """ | ||
| select /*+ BROADCAST(df_school) */ * from df, df_school where df.id == df_school.id | ||
| """ |
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nit: PySpark API looks nicer and would not require resorting to view registration along the lines
df.join(broadcast(df_school), df.id == df_school.id) There was a problem hiding this comment.
Understood, but this test requires a join hint to ensure a broadcast hash join is used in this test.
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Signed-off-by: Navin Kumar <navink@nvidia.com>
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Apr 12, 2024
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Fixes #10645.
This wraps the GpuShuffleCoalesceIterator into a GpuCoalesceIterator with a coalesce goal of RequireSingleBatch. This ensures that we always get a single batch to use for the broadcast join. Also added an integration test that tweaks the batch size to test this codepath.