Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/10703#discussion_r49675326
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/bucket.scala
---
@@ -56,3 +57,9 @@ private[sql] abstract class BucketedOutputWriterFactory
extends OutputWriterFact
context: TaskAttemptContext): OutputWriter =
throw new UnsupportedOperationException("use bucket version")
}
+
+private[sql] object BucketingUtils {
--- End diff --
+1
Structurally it is better for bucketing to be a user of a general hash
expression, rather than the other way around.
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