Xiao Li created SPARK-16041:
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Summary: Disallow Duplicate Columns in `partitionBy`, `blockBy`
and `sortBy`
Key: SPARK-16041
URL: https://issues.apache.org/jira/browse/SPARK-16041
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.0.0
Reporter: Xiao Li
Duplicate columns are not allowed in `partitionBy`, `blockBy`, `sortBy`. The
duplicate columns could cause unpredictable results. For example, the
resolution failure.
We should detect the duplicates and issue exceptions with appropriate messages.
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