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How to make a PIG UDF
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Stuart Lodge
November 06, 2012
Technology
1
2.1k
How to make a PIG UDF
A C# Developers intro...
Stuart Lodge
November 06, 2012
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Transcript
How to make a PIG UDF An Eclipse Beginners Guide…
The Java UDF ‘how to’ http://pig.apache.org/docs/r0.8.1/udf.html
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;
The simple UDF
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
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
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
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
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
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 So… let’s write this UDF…
That’s it! www.newgrove.com