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.Fix aee #61

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.Fix aee #61

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2 changes: 1 addition & 1 deletion sql/core/src/main/scala/org/apache/spark/sql/execution/exchange/ExchangeCoordinator.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -237,7 +237,7 @@ class ExchangeCoordinator(
// number of post-shuffle partitions.
val partitionStartIndices =
if (mapOutputStatistics.length == 0) {
Array.empty[Int]
Array(0)
} else {
estimatePartitionStartIndices(mapOutputStatistics)
}
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11 changes: 11 additions & 0 deletions sql/core/src/test/scala/org/apache/spark/sql/execution/ExchangeCoordinatorSuite.scala
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Expand Up @@ -527,4 +527,15 @@ class ExchangeCoordinatorSuite extends SparkFunSuite with BeforeAndAfterAll {
}
withSparkSession(test, 4, None)
}

test("SPARK-29284 adaptive query execution works correctly " +
"when first stage partitions size is 0") {
val test = { spark: SparkSession =>
spark.sql("SET spark.sql.adaptive.enabled=true")
spark.sql("SET spark.sql.shuffle.partitions=1")
val resultDf = spark.range(0).distinct().groupBy().count()
checkAnswer(resultDf, Row(0) :: Nil)
}
withSparkSession(test, 4, None)
}
}