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Commit 52636226 authored by Liang-Chi Hsieh's avatar Liang-Chi Hsieh Committed by Wenchen Fan
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[SPARK-18932][SQL] Support partial aggregation for collect_set/collect_list

## What changes were proposed in this pull request?

Currently collect_set/collect_list aggregation expression don't support partial aggregation. This patch is to enable partial aggregation for them.

## How was this patch tested?

Jenkins tests.

Please review http://spark.apache.org/contributing.html before opening a pull request.

Author: Liang-Chi Hsieh <viirya@gmail.com>

Closes #16371 from viirya/collect-partial-support.
parent e5c307c5
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