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Sessionization in SQL, Hive, Pig and Python — Dataiku Academy 7.0 documentation

Why sessionization?¶ Sessionization is the act of turning event-based data into sessions, the ordered list of a user’s actions in completing a task. It is widely used in several domains, such as: Web analytics. This is the most common use, where a session is composed of a user’s actions during one particular visit to the website. You can think of this as a buying session on a e-business website fo

showyou 2017/02/07

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Pig ユーザー定義関数メモ(Hishidama's Apache Pig UDF Memo)

S-JIS[2011-08-14/2011-09-22] 変更履歴 Pigユーザー定義関数 Pigのユーザー定義関数（User Defined Function：UDF）の作り方のメモ。クラス作成 Pigで使う関数を作るには、org.apache.pig.EvalFuncを継承したクラスを作成し、exec()メソッドをオーバーライドする。 EvalFuncの型引数にはexec()の戻り型を指定する。 package pigudf; import java.io.IOException; import org.apache.pig.EvalFunc; import org.apache.pig.data.Tuple; public class SampleUDF extends EvalFunc<String> { @Override public String exec(Tuple in