Github user aarondav commented on a diff in the pull request:
https://github.com/apache/spark/pull/564#discussion_r12025339
--- Diff: docs/sql-programming-guide.md ---
@@ -114,6 +114,8 @@ val sqlContext = new org.apache.spark.sql.SQLContext(sc)
import sqlContext._
// Define the schema using a case class.
+// Note: Case classes in Scala 2.10 can support only up to 22 fields. To
work around this limit,
+// you can use custom classes that implements the Product interface.
--- End diff --
implement*
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