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Commit b60b8137 authored by Wenchen Fan's avatar Wenchen Fan Committed by Reynold Xin
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[SPARK-13617][SQL] remove unnecessary GroupingAnalytics trait 

## What changes were proposed in this pull request?

The `trait GroupingAnalytics` only has one implementation, it's an unnecessary abstraction. This PR removes it, and does some code simplification when resolving `GroupingSet`.

## How was this patch tested?

existing tests

Author: Wenchen Fan <wenchen@databricks.com>

Closes #11469 from cloud-fan/groupingset.
parent 6250cf1e
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