Cheng Lian created SPARK-14004:
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Summary: AttributeReference and Alias should only use their first
qualifier to build SQL representations
Key: SPARK-14004
URL: https://issues.apache.org/jira/browse/SPARK-14004
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.0.0
Reporter: Cheng Lian
Assignee: Cheng Lian
Current implementation joins all qualifiers, which is wrong.
However, this doesn't cause any real SQL generation bugs as there is always at
most one qualifier for any given {{AttributeReference}} or {{Alias}}.
We can probably use {{Option\[String\]}} instead of {{Seq\[String\]}} to
represent qualifiers.
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