Li Yuanjian created SPARK-22546:
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Summary: Allow users to update the dataType of a column
Key: SPARK-22546
URL: https://issues.apache.org/jira/browse/SPARK-22546
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.1.0
Reporter: Li Yuanjian
[SPARK-17910|https://issues.apache.org/jira/browse/SPARK-17910] supported user
to change comment of column, the patch also left TODO for other metadata. Here
just implement the dataType changing requirement, others like renaming column
and changing position may have different considerations in datasource table and
hive table, maybe need more discussion.
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