Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/4446#discussion_r24467856
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/commands.scala ---
@@ -166,15 +160,82 @@ case class CreateMetastoreDataSourceAsSelect(
options
}
- // Create the relation based on the data of df.
- ResolvedDataSource(sqlContext, provider, optionsWithPath, df)
+ if (sqlContext.catalog.tableExists(Seq(tableName))) {
+ // Check if we need to throw an exception or just return.
+ mode match {
+ case SaveMode.ErrorIfExists =>
+ sys.error(s"Table $tableName already exists. " +
+ s"If you want to append into it, please set mode to
SaveMode.Append. " +
+ s"Or, if you want to overwrite it, please set mode to
SaveMode.Overwrite.")
--- End diff --
this error is going to print even if its a SQL CTAS right? that might be
confusing.
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