public class UDFCurrentDB extends GenericUDF
GenericUDF.DeferredJavaObject, GenericUDF.DeferredObject
Constructor and Description |
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UDFCurrentDB() |
Modifier and Type | Method and Description |
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void |
configure(MapredContext context)
Additionally setup GenericUDF with MapredContext before initializing.
|
Object |
evaluate(GenericUDF.DeferredObject[] arguments)
Evaluate the GenericUDF with the arguments.
|
String |
getDisplayString(String[] children)
Get the String to be displayed in explain.
|
ObjectInspector |
initialize(ObjectInspector[] arguments)
Initialize this GenericUDF.
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checkArgGroups, checkArgPrimitive, checkArgsSize, close, copyToNewInstance, flip, getArgOrder, getConstantIntValue, getConstantLongValue, getConstantStringValue, getDateValue, getDoubleValue, getFuncName, getIntValue, getLongValue, getRequiredFiles, getRequiredJars, getStandardDisplayString, getStandardDisplayString, getStringValue, getTimestampValue, getUdfName, initializeAndFoldConstants, negative, obtainDateConverter, obtainDoubleConverter, obtainIntConverter, obtainLongConverter, obtainStringConverter, obtainTimestampConverter
public void configure(MapredContext context)
GenericUDF
configure
in class GenericUDF
context
- contextpublic ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException
GenericUDF
initialize
in class GenericUDF
arguments
- The ObjectInspector for the argumentsUDFArgumentException
- Thrown when arguments have wrong types, wrong length, etc.public Object evaluate(GenericUDF.DeferredObject[] arguments) throws HiveException
GenericUDF
evaluate
in class GenericUDF
arguments
- The arguments as DeferedObject, use DeferedObject.get() to get the
actual argument Object. The Objects can be inspected by the
ObjectInspectors passed in the initialize call.HiveException
public String getDisplayString(String[] children)
GenericUDF
getDisplayString
in class GenericUDF
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