How to make a pig udf Especially for C# coders

1. How to make a PIG UDF
An Eclipse Beginners Guide…

2. The Java UDF ‘how to’
http://pig.apache.org/docs/r0.8.1/udf.html

3. Simple UDF Script
-- myscript.pig
REGISTER myudfs.jar;
A = LOAD 'student_data'
AS (name: chararray, age: int, gpa: float);
B = FOREACH A
GENERATE myudfs.UPPER(name);
DUMP B;

4. The simple UDF

5. So… let’s write this UDF…
1. Start Eclipse
2. Create a new Java Project
3. Add pig.jar as an external Jar
4. Write our UDF class
5. Compile to a JAR

6. So… let’s write this UDF…
1. Start Eclipse
2. Create a new Java Project
3. Add pig.jar as an external Jar
4. Write our UDF class
5. Compile to a JAR

7. So… let’s write this UDF…
1. Start Eclipse
2. Create a new Java Project
3. Add pig.jar as an external Jar
4. Write our UDF class
5. Compile to a JAR

8. So… let’s write this UDF…
1. Start Eclipse
2. Create a new Java Project
3. Add pig.jar as an external Jar
4. Write our UDF class
5. Compile to a JAR

9. So… let’s write this UDF…
1. Start Eclipse
2. Create a new Java Project
3. Add pig.jar as an external Jar
4. Write our UDF class
5. Compile to a JAR

10. 1. Start Eclipse write this UDF…
So… let’s
2. Create a new Java Project
3. Add pig.jar as an external Jar
4. Write our UDF class
5. Compile to a JAR

11. That’s it!
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