org.apache.hadoop.hive.ql.udf.generic
Class GenericUDFBaseUnary
java.lang.Object
org.apache.hadoop.hive.ql.udf.generic.GenericUDF
org.apache.hadoop.hive.ql.udf.generic.GenericUDFBaseUnary
- All Implemented Interfaces:
- Closeable
- Direct Known Subclasses:
- GenericUDFOPNegative, GenericUDFOPPositive
public abstract class GenericUDFBaseUnary
- extends GenericUDF
GenericUDFBaseUnary
public GenericUDFBaseUnary()
initialize
public ObjectInspector initialize(ObjectInspector[] arguments)
throws UDFArgumentException
- Description copied from class:
GenericUDF
- Initialize this GenericUDF. This will be called once and only once per
GenericUDF instance.
- Specified by:
initialize
in class GenericUDF
- Parameters:
arguments
- The ObjectInspector for the arguments
- Returns:
- The ObjectInspector for the return value
- Throws:
UDFArgumentException
- Thrown when arguments have wrong types, wrong length, etc.
getDisplayString
public String getDisplayString(String[] children)
- Description copied from class:
GenericUDF
- Get the String to be displayed in explain.
- Specified by:
getDisplayString
in class GenericUDF
Copyright © 2014 The Apache Software Foundation. All rights reserved.