git commit: add note of how to support table with more than 22 fields

[rx...@apache.org]

Repository: spark
Updated Branches:
  refs/heads/master 058797c17 -> e6e44e46e


add note of how to support table with more than 22 fields

Author: wangfei <wa...@huawei.com>

Closes #564 from scwf/patch-6 and squashes the following commits:

a331876 [wangfei] Update sql-programming-guide.md
685135b [wangfei] Update sql-programming-guide.md
10b3dc0 [wangfei] Update sql-programming-guide.md
1c40480 [wangfei] add note of how to support table with 22 fields


Project: http://git-wip-us.apache.org/repos/asf/spark/repo
Commit: http://git-wip-us.apache.org/repos/asf/spark/commit/e6e44e46
Tree: http://git-wip-us.apache.org/repos/asf/spark/tree/e6e44e46
Diff: http://git-wip-us.apache.org/repos/asf/spark/diff/e6e44e46

Branch: refs/heads/master
Commit: e6e44e46e345640fd89be9f10cdc448b44d30cc1
Parents: 058797c
Author: wangfei <wa...@huawei.com>
Authored: Sat Apr 26 14:38:42 2014 -0700
Committer: Reynold Xin <rx...@apache.org>
Committed: Sat Apr 26 14:38:42 2014 -0700

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 docs/sql-programming-guide.md | 2 ++
 1 file changed, 2 insertions(+)
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http://git-wip-us.apache.org/repos/asf/spark/blob/e6e44e46/docs/sql-programming-guide.md
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diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md
index 3ca6cc9..0c743c9 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.