org.apache.pig.piggybank.evaluation.string
Class UPPER
java.lang.Object
org.apache.pig.EvalFunc<String>
org.apache.pig.piggybank.evaluation.string.UPPER
public class UPPER
- extends EvalFunc<String>
string.UPPER implements eval function to convert a string to upper case
Example:
register pigudfs.jar;
A = load 'mydata' as (name);
B = foreach A generate string.UPPER(name);
dump B;
Constructor Summary |
UPPER()
|
Methods inherited from class org.apache.pig.EvalFunc |
finish, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, isAsynchronous, progress, setPigLogger, setReporter, warn |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
UPPER
public UPPER()
exec
public String exec(Tuple input)
throws IOException
- Upper-cases an input string.
- Specified by:
exec
in class EvalFunc<String>
- Parameters:
input
- tuple; first column is assumed to have the column to convert
- Returns:
- result, of type T.
- Throws:
IOException
outputSchema
public Schema outputSchema(Schema input)
- This method gives a name to the column.
- Overrides:
outputSchema
in class EvalFunc<String>
- Parameters:
input
- - schema of the input data
- Returns:
- schema of the input data
getArgToFuncMapping
public List<FuncSpec> getArgToFuncMapping()
throws FrontendException
- Overrides:
getArgToFuncMapping
in class EvalFunc<String>
- Returns:
- A List containing FuncSpec objects representing the Function class
which can handle the inputs corresponding to the schema in the objects
- Throws:
FrontendException
Copyright © ${year} The Apache Software Foundation