Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/15926#discussion_r88824474
--- Diff:
sql/hive/src/test/scala/org/apache/spark/sql/hive/MetastoreDataSourcesSuite.scala
---
@@ -413,6 +413,40 @@ class MetastoreDataSourcesSuite extends QueryTest with
SQLTestUtils with TestHiv
}
}
+ test("saveAsTable(CTAS) using append and insertInto when the target
table is Hive serde") {
+ val tableName = "tab1"
+ withTable(tableName) {
+ sql(s"CREATE TABLE $tableName STORED AS SEQUENCEFILE AS SELECT 1 AS
key, 'abc' AS value")
+
+ val df = sql(s"SELECT key, value FROM $tableName")
+ val e = intercept[AnalysisException] {
+ df.write.mode(SaveMode.Append).saveAsTable(tableName)
+ }.getMessage
+ assert(e.contains("Saving data in the Hive serde table
`default`.`tab1` is not supported " +
+ "yet. Please use the insertInto() API as an alternative."))
+
+ df.write.insertInto(tableName)
+ checkAnswer(
+ sql(s"SELECT * FROM $tableName"),
+ Row(1, "abc") :: Row(1, "abc") :: Nil
+ )
+ }
+ }
+
+ test("saveAsTable(CTAS) using overwrite when the target table is Hive
serde") {
+ val tableName = "tab1"
+ withTable(tableName) {
+ sql(s"CREATE TABLE $tableName STORED AS SEQUENCEFILE AS SELECT 1 AS
key, 'abc' AS value")
+ val df = sql(s"SELECT key, value FROM $tableName")
+ df.write.mode(SaveMode.Overwrite).saveAsTable(tableName)
+ val tableMeta =
spark.sessionState.catalog.getTableMetadata(TableIdentifier(tableName))
+ // When the mode is OVERWRITE, we drop the Hive serde tables and
create a data source table
+ // TODO: Based on the definition of OVERWRITE, no change should be
made on the table
+ // definition. When recreate the table, we need to create a Hive
serde table.
--- End diff --
Let's create a ticket for this bug, instead of writing a test to check this
wrong behaviour.
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