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https://issues.apache.org/jira/browse/SPARK-16803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15418096#comment-15418096
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Apache Spark commented on SPARK-16803:
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User 'gatorsmile' has created a pull request for this issue:
https://github.com/apache/spark/pull/14612
> SaveAsTable does not work when source DataFrame is built on a Hive Table
> ------------------------------------------------------------------------
>
> Key: SPARK-16803
> URL: https://issues.apache.org/jira/browse/SPARK-16803
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.0
> Reporter: Xiao Li
>
> {noformat}
> scala> sql("create table sample.sample stored as SEQUENCEFILE as select 1 as
> key, 'abc' as value")
> res2: org.apache.spark.sql.DataFrame = []
> scala> val df = sql("select key, value as value from sample.sample")
> df: org.apache.spark.sql.DataFrame = [key: int, value: string]
> scala> df.write.mode("append").saveAsTable("sample.sample")
> scala> sql("select * from sample.sample").show()
> +---+-----+
> |key|value|
> +---+-----+
> | 1| abc|
> | 1| abc|
> +---+-----+
> {noformat}
> In Spark 1.6, it works, but Spark 2.0 does not work. The error message from
> Spark 2.0 is
> {noformat}
> scala> df.write.mode("append").saveAsTable("sample.sample")
> org.apache.spark.sql.AnalysisException: Saving data in MetastoreRelation
> sample, sample
> is not supported.;
> {noformat}
> So far, we do not plan to support it in Spark 2.0. Spark 1.6 works because it
> internally uses {{insertInto}}. But, if we change it back it will break the
> semantic of {{saveAsTable}} (this method uses by-name resolution instead of
> using by-position resolution used by {{insertInto}}).
> Instead, users should use {{insertInto}} API. We should correct the error
> messages. Users can understand how to bypass it before we support it.
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