spark git commit: [SPARK-10216][SQL] Avoid creating empty files during overwriting with group by query

Repository: spark Updated Branches: refs/heads/branch-2.0 adc1c2685 -> af37bdd3a [SPARK-10216][SQL] Avoid creating empty files during overwriting with group by query ## What changes were proposed in this pull request? Currently, `INSERT INTO` with `GROUP BY` query tries to make at least 200

spark git commit: [SPARK-10216][SQL] Avoid creating empty files during overwriting with group by query

Repository: spark Updated Branches: refs/heads/master 20a89478e -> 8d05a7a98 [SPARK-10216][SQL] Avoid creating empty files during overwriting with group by query ## What changes were proposed in this pull request? Currently, `INSERT INTO` with `GROUP BY` query tries to make at least 200