| Modifier and Type | Class and Description |
|---|---|
static class |
HiveUDAF.Final |
static class |
HiveUDAF.Initial |
static class |
HiveUDAF.Intermediate |
protected static class |
HiveUDFBase.ConstantObjectInspectInfo |
protected static class |
HiveUDFBase.HiveReporter
A constant of Reporter type that does nothing.
|
EvalFunc.SchemaTypelog, pigLogger, reporter, returnType| Constructor and Description |
|---|
HiveUDAF(String funcName) |
HiveUDAF(String funcName,
String params) |
| Modifier and Type | Method and Description |
|---|---|
Object |
exec(Tuple input)
This callback method must be implemented by all subclasses.
|
protected static String |
getErrorMessage(Class c) |
String |
getFinal()
Get the final function.
|
String |
getInitial()
Get the initial function.
|
String |
getIntermed()
Get the intermediate function.
|
List<String> |
getShipFiles()
Allow a UDF to specify a list of local files it would like placed in the distributed
cache.
|
protected static org.apache.hadoop.hive.ql.exec.MapredContext |
instantiateMapredContext() |
Schema |
outputSchema(Schema input)
Report the schema of the output of this UDF.
|
protected static Class |
resolveFunc(String funcName) |
allowCompileTimeCalculation, finish, getArgToFuncMapping, getCacheFiles, getInputSchema, getLoadCaster, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, isAsynchronous, needEndOfAllInputProcessing, progress, setEndOfAllInput, setInputSchema, setPigLogger, setReporter, setUDFContextSignature, warnpublic HiveUDAF(String funcName) throws IOException, InstantiationException, IllegalAccessException
public HiveUDAF(String funcName, String params) throws IOException, InstantiationException, IllegalAccessException
public String getInitial()
AlgebraicgetInitial in interface Algebraicpublic String getIntermed()
AlgebraicgetIntermed in interface Algebraicpublic String getFinal()
Algebraicpublic Object exec(Tuple input) throws IOException
EvalFuncexec in class EvalFunc<Object>input - the Tuple to be processed.IOExceptionpublic Schema outputSchema(Schema input)
EvalFunc
The default implementation interprets the OutputSchema annotation,
if one is present. Otherwise, it returns null (no known output schema).
outputSchema in class EvalFunc<Object>input - Schema of the inputprotected static Class resolveFunc(String funcName) throws IOException
IOExceptionprotected static org.apache.hadoop.hive.ql.exec.MapredContext instantiateMapredContext()
public List<String> getShipFiles()
EvalFuncFuncUtils for utility function to facilitate it
The default implementation returns null.getShipFiles in class EvalFunc<Object>Copyright © 2007-2017 The Apache Software Foundation