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

Class Decimal64ColumnVector

java.lang.Object

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

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

org.apache.hadoop.hive.ql.exec.vector.Decimal64ColumnVector

public class Decimal64ColumnVector
extends LongColumnVector

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
short	precision
short	scale

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

NULL_VALUE, vector

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

isNull, isRepeating, noNulls, type

Constructor Summary

Constructors

Constructor and Description
Decimal64ColumnVector(int precision, int scale)
Decimal64ColumnVector(int size, int precision, int scale)

Method Summary

Modifier and Type	Method and Description
HiveDecimalWritable	getScratchWritable() Return a convenience writable object stored by this column vector.
void	set(int elementNum, HiveDecimal hiveDec) Set a Decimal64 field from a HiveDecimal.
void	set(int elementNum, HiveDecimalWritable writable) Set a Decimal64 field from a HiveDecimalWritable.
void	setElement(int outputElementNum, int inputElementNum, ColumnVector inputColVector) Set the element in this column vector from the given input vector.

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

copySelected, copySelected, ensureSize, fill, fillWithNulls, flatten, shallowCopyTo, stringifyValue

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

decRef, flattenNoNulls, flattenPush, flattenRepeatingNulls, getRef, incRef, init, reset, setRepeating, unFlatten

Methods inherited from class java.lang.Object

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

Field Detail

scale

public short scale

precision

public short precision

Constructor Detail

Decimal64ColumnVector

public Decimal64ColumnVector(int precision,
                             int scale)

Decimal64ColumnVector

public Decimal64ColumnVector(int size,
                             int precision,
                             int scale)

Method Detail

set

public void set(int elementNum,
                HiveDecimalWritable writable)

Set a Decimal64 field from a HiveDecimalWritable. This is a FAST version that assumes the caller has checked to make sure the writable is not null and elementNum is correctly adjusted for isRepeating. And, that the isNull entry has been set. We will check for precision/scale range, so the entry's NULL may get set. Otherwise, only the output entry fields will be set by this method.

Parameters:

elementNum -

writable -

set

public void set(int elementNum,
                HiveDecimal hiveDec)

Set a Decimal64 field from a HiveDecimal. This is a FAST version that assumes the caller has checked to make sure the hiveDec is not null and elementNum is correctly adjusted for isRepeating. And, that the isNull entry has been set. We will check for precision/scale range, so the entry's NULL may get set. Otherwise, only the output entry fields will be set by this method.

Parameters:

elementNum -

hiveDec -

setElement

public void setElement(int outputElementNum,
                       int inputElementNum,
                       ColumnVector inputColVector)

Set the element in this column vector from the given input vector. The inputElementNum will be adjusted to 0 if the input column has isRepeating set. On the other hand, the outElementNum must have been adjusted to 0 in ADVANCE when the output has isRepeating set. IMPORTANT: if the output entry is marked as NULL, this method will do NOTHING. This supports the caller to do output NULL processing in advance that may cause the output results operation to be ignored. Thus, make sure the output isNull entry is set in ADVANCE. The inputColVector noNulls and isNull entry will be examined. The output will only be set if the input is NOT NULL. I.e. noNulls || !isNull[inputElementNum] where inputElementNum may have been adjusted to 0 for isRepeating. If the input entry is NULL or out-of-range, the output will be marked as NULL. I.e. set output noNull = false and isNull[outElementNum] = true. An example of out-of-range is the DecimalColumnVector which can find the input decimal does not fit in the output precision/scale. (Since we return immediately if the output entry is NULL, we have no need and do not mark the output entry to NOT NULL).

Overrides:

setElement in class LongColumnVector

getScratchWritable

public HiveDecimalWritable getScratchWritable()

Return a convenience writable object stored by this column vector.

Returns: