Merge remote-tracking branch 'origin/master' into max-length

src/it/scala/com/databricks/spark/redshift/RedshiftIntegrationSuite.scala

@@ -410,6 +410,27 @@ class RedshiftIntegrationSuite
     }
   }
 
+  test("informative error message when saving a table with string that is longer than max length") {
+    val tableName = s"error_message_when_string_too_long_$randomSuffix"
+    try {
+      val df = sqlContext.createDataFrame(sc.parallelize(Seq(Row("a" * 512))),
+        StructType(StructField("A", StringType) :: Nil))
+      val e = intercept[SQLException] {
+        df.write
+          .format("com.databricks.spark.redshift")
+          .option("url", jdbcUrl)
+          .option("dbtable", tableName)
+          .option("tempdir", tempDir)
+          .mode(SaveMode.ErrorIfExists)
+          .save()
+      }
+      assert(e.getMessage.contains("while loading data into Redshift"))
+    } finally {
+      conn.prepareStatement(s"drop table if exists $tableName").executeUpdate()
+      conn.commit()
+    }
+  }
+
   test("SaveMode.Overwrite with non-existent table") {
     val tableName = s"overwrite_non_existent_table$randomSuffix"
     try {