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| -rw-r--r-- | docs/sql-programming-guide.md | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md index 3ca6cc95bd..0c743c9d60 100644 --- a/docs/sql-programming-guide.md +++ b/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 implement the Product interface. case class Person(name: String, age: Int) // Create an RDD of Person objects and register it as a table. |