Github user srowen commented on the issue:
https://github.com/apache/spark/pull/20846
What JIRA was this really about?
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Github user AmplabJenkins commented on the issue:
https://github.com/apache/spark/pull/20846
Can one of the admins verify this patch?
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Github user AmplabJenkins commented on the issue:
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Github user AmplabJenkins commented on the issue:
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Github user dongjoon-hyun commented on the issue:
https://github.com/apache/spark/pull/20846
Right, @gatorsmile .
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Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/20846
We do not allow users to change the table column type. Currently, only the
column comments are allowed to change if users issue the command through Spark.
However, users still can change it
Github user dongjoon-hyun commented on the issue:
https://github.com/apache/spark/pull/20846
Definitely, +1 for your idea. Since that is different from this PR. Could
you try to make a PR instead of this PR?
> We should prevent user to change table's column type
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Github user liutang123 commented on the issue:
https://github.com/apache/spark/pull/20846
The exception is not thrown in `ALTER TABLE`.
We should prevent user to change table's column type. But, for historical
data, should we do some compatible measures?
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Github user dongjoon-hyun commented on the issue:
https://github.com/apache/spark/pull/20846
@liutang123 , Spark should not do this kind of risky thing. Hive 2.3.2 also
disallows incompatible schema changes like the following.
```sql
hive> CREATE TABLE test_par(a string)
Github user dongjoon-hyun commented on the issue:
https://github.com/apache/spark/pull/20846
@liutang123 . Did you test this with the latest Apache Spark 2.3? Apache
Spark 2.3 works without any problem with your example.
```scala
scala> sql("create table test_par(a string)
Github user AmplabJenkins commented on the issue:
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