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| author | Yash Datta <Yash.Datta@guavus.com> | 2016-01-06 10:37:53 -0800 |
|---|---|---|
| committer | Michael Armbrust <michael@databricks.com> | 2016-01-06 10:37:53 -0800 |
| commit | 9061e777fdcd5767718808e325e8953d484aa761 (patch) | |
| tree | 5b32ed186423fae94bff2f808495728668bd6054 /python/pyspark/ml/param/_shared_params_code_gen.py | |
| parent | 94c202c7d2c613d00a0a56f870a0cddbff599be3 (diff) | |
| download | spark-9061e777fdcd5767718808e325e8953d484aa761.tar.gz spark-9061e777fdcd5767718808e325e8953d484aa761.tar.bz2 spark-9061e777fdcd5767718808e325e8953d484aa761.zip | |
[SPARK-11878][SQL] Eliminate distribute by in case group by is present with exactly the same grouping expressi
For queries like :
select <> from table group by a distribute by a
we can eliminate distribute by ; since group by will anyways do a hash partitioning
Also applicable when user uses Dataframe API
Author: Yash Datta <Yash.Datta@guavus.com>
Closes #9858 from saucam/eliminatedistribute.
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