GitHub user xuanyuanking opened a pull request:
https://github.com/apache/spark/pull/19773
Supporting for changing column dataType
## What changes were proposed in this pull request?
Support user to change column dataType in hive table and datasource table,
here also want to make a further discuss for other ddl requirement.
## How was this patch tested?
Add test case in `DDLSuite.scala` and `SQLQueryTestSuite.scala`
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/xuanyuanking/spark SPARK-22546
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19773.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #19773
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commit 1bcd74fae9cb6595e04eab6ecaf621739644102f
Author: Yuanjian Li <xyliyuanj...@gmail.com>
Date: 2017-11-17T12:11:33Z
Support change column dataType
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