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Commit 81498dd5 authored by Davies Liu's avatar Davies Liu Committed by Davies Liu
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[SPARK-11425] [SPARK-11486] Improve hybrid aggregation

After aggregation, the dataset could be smaller than inputs, so it's better to do hash based aggregation for all inputs, then using sort based aggregation to merge them.

Author: Davies Liu <davies@databricks.com>

Closes #9383 from davies/fix_switch.
parent d0b56339
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