org.apache.hadoop.hive.ql.exec.vector.expressions
Class StringUnaryUDFDirect
java.lang.Object
org.apache.hadoop.hive.ql.exec.vector.expressions.VectorExpression
org.apache.hadoop.hive.ql.exec.vector.expressions.StringUnaryUDFDirect
- All Implemented Interfaces:
- Serializable
- Direct Known Subclasses:
- StringLTrim, StringRTrim, StringTrim
public abstract class StringUnaryUDFDirect
- extends VectorExpression
This is a superclass for unary string functions that operate directly on the
input and set the output. It is suitable for direct, in-place operations on
strings, such as for fast implementations of TRIM(), LTRIM(), and RTRIM().
- See Also:
- Serialized Form
StringUnaryUDFDirect
public StringUnaryUDFDirect(int inputColumn,
int outputColumn)
StringUnaryUDFDirect
public StringUnaryUDFDirect()
evaluate
public void evaluate(VectorizedRowBatch batch)
- Description copied from class:
VectorExpression
- This is the primary method to implement expression logic.
- Specified by:
evaluate
in class VectorExpression
getOutputColumn
public int getOutputColumn()
- Description copied from class:
VectorExpression
- Returns the index of the output column in the array
of column vectors. If not applicable, -1 is returned.
- Specified by:
getOutputColumn
in class VectorExpression
- Returns:
- Index of the output column
setOutputColumn
public void setOutputColumn(int outputColumn)
getInputColumn
public int getInputColumn()
setInputColumn
public void setInputColumn(int inputColumn)
getOutputType
public String getOutputType()
- Description copied from class:
VectorExpression
- Returns type of the output column.
- Overrides:
getOutputType
in class VectorExpression
getDescriptor
public VectorExpressionDescriptor.Descriptor getDescriptor()
- Specified by:
getDescriptor
in class VectorExpression
Copyright © 2014 The Apache Software Foundation. All rights reserved.