Li Yuanjian created SPARK-21435:
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Summary: Empty files should be skipped while write to file
Key: SPARK-21435
URL: https://issues.apache.org/jira/browse/SPARK-21435
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.2.0
Reporter: Li Yuanjian
Consider of this scenario, source table has many partitions and data files,
after the query filter, only a few data write to the destination dir.
In this case the destination dir or table will have many empty files or files
only have schema meta(parquet format), I know we can use coalesce but skip the
empty file may be more better in this case.
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