August 2015
Intermediate to advanced
312 pages
7h 28m
Japanese
Content preview from 初めてのSpark
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
168
9 章 Spark SQL
9-1
Spark SQL
本章では、まず
SchemaRDD
を通常の
Spark
のプログラム内から使い、構造化データのロー
ドとクエリを行う方法を紹介します。続いて
Spark SQL
の
JDBC
サーバーを紹介します。
Spark
SQL JDBC
サーバーを使うことによって、
Spark SQL
を共有サーバー上で実行し、
SQL
シェルや
Tableau
のようなビジュアライゼーションツールから接続できるようになります。最後に、いく
つかの高度な機能を取り上げます。
Spark SQL
は
Spark
の中でも新しいコンポーネントであり、
Spark 1.3
や将来のバージョンでは、さらに大きく進化するでしょう。そのため、
Spark SQL
や
SchemaRDD
の最新の情報は、最も新しいドキュメンテーションを参照するようにしてください。
本章を進めて行くに当たっては、ツイートを含む
JSON
ファイルを調べるために
Spark SQL
を
使います。手元にツイートがない場合は、
Databricks
のリファレンスアプリケーション（
http://
databricks.gitbooks.io/databricks-spark-reference-applications/content/twitter_classifier/index.
html
）を使い、多少のツイートをダウンロードしておくか、本書の
Git
リポジトリの
files/
testweet.json
を使ってください。
9.1
Spark SQL ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.