Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/7342#discussion_r34711225
--- Diff: sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
---
@@ -761,4 +761,43 @@ class DataFrameSuite extends QueryTest {
assert(f.getMessage.contains("column3"))
assert(!f.getMessage.contains("column2"))
}
+
+ test("SPARK-6941: Better error message for inserting into RDD-based
Table") {
+ val df = Seq(Tuple1(1)).toDF()
+ val insertion = Seq(Tuple1(2)).toDF("col")
+
+ // pass case: parquet table (HadoopFsRelation)
+ df.write.mode(SaveMode.Overwrite).parquet("tmp_parquet")
+ val pdf = ctx.read.parquet("tmp_parquet")
+ pdf.registerTempTable("parquet_base")
+ insertion.write.insertInto("parquet_base")
+
+ // pass case: json table (InsertableRelation)
+ df.write.mode(SaveMode.Overwrite).json("tmp_json")
+ val jdf = ctx.read.json("tmp_json")
+ jdf.registerTempTable("json_base")
+ insertion.write.mode(SaveMode.Overwrite).insertInto("json_base")
+
+ // error cases: insert into a RDD
--- End diff --
a RDD => an RDD
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