org.apache.hadoop.hive.ql.exec.vector

Class LongColumnVector

java.lang.Object

org.apache.hadoop.hive.ql.exec.vector.ColumnVector

org.apache.hadoop.hive.ql.exec.vector.LongColumnVector

public class LongColumnVector
extends ColumnVector

This class represents a nullable int column vector. This class will be used for operations on all integer types (tinyint, smallint, int, bigint) and as such will use a 64-bit long value to hold the biggest possible value. During copy-in/copy-out, smaller int types will be converted as needed. This will reduce the amount of code that needs to be generated and also will run fast since the machine operates with 64-bit words. The vector[] field is public by design for high-performance access in the inner loop of query execution.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.exec.vector.ColumnVector

ColumnVector.Type

Field Summary

Fields

Modifier and Type	Field and Description
static long	NULL_VALUE
long[]	vector

Fields inherited from class org.apache.hadoop.hive.ql.exec.vector.ColumnVector

isNull, isRepeating, noNulls

Constructor Summary

Constructors

Constructor and Description
LongColumnVector() Use this constructor by default.
LongColumnVector(int len) Don't use this except for testing purposes.

Method Summary

Methods

Modifier and Type	Method and Description
void	copySelected(boolean selectedInUse, int[] sel, int size, DoubleColumnVector output)
void	copySelected(boolean selectedInUse, int[] sel, int size, LongColumnVector output)
void	fill(long value)
void	flatten(boolean selectedInUse, int[] sel, int size)
org.apache.hadoop.io.Writable	getWritableObject(int index)
void	setElement(int outElementNum, int inputElementNum, ColumnVector inputVector) Set the element in this column vector from the given input vector.

Methods inherited from class org.apache.hadoop.hive.ql.exec.vector.ColumnVector

flattenNoNulls, flattenPush, flattenRepeatingNulls, init, reset, unFlatten

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

vector

public long[] vector

NULL_VALUE

public static final long NULL_VALUE

See Also:

Constant Field Values

Constructor Detail

LongColumnVector

public LongColumnVector()

Use this constructor by default. All column vectors should normally be the default size.

LongColumnVector

public LongColumnVector(int len)

Don't use this except for testing purposes.

Parameters:

len -

Method Detail

getWritableObject

public org.apache.hadoop.io.Writable getWritableObject(int index)

Specified by:

getWritableObject in class ColumnVector

copySelected

public void copySelected(boolean selectedInUse,
                int[] sel,
                int size,
                LongColumnVector output)

copySelected

public void copySelected(boolean selectedInUse,
                int[] sel,
                int size,
                DoubleColumnVector output)

fill

public void fill(long value)

flatten

public void flatten(boolean selectedInUse,
           int[] sel,
           int size)

Specified by:

flatten in class ColumnVector

setElement

public void setElement(int outElementNum,
              int inputElementNum,
              ColumnVector inputVector)

Description copied from class: ColumnVector

Set the element in this column vector from the given input vector.

Specified by:

setElement in class ColumnVector