org.apache.flink.table.dataformat.vector.heap

类 HeapBytesVector

java.lang.Object

org.apache.flink.table.dataformat.vector.AbstractColumnVector

org.apache.flink.table.dataformat.vector.heap.AbstractHeapVector

org.apache.flink.table.dataformat.vector.heap.HeapBytesVector

所有已实现的接口:

Serializable, BytesColumnVector, ColumnVector

public class HeapBytesVector
extends AbstractHeapVector
implements BytesColumnVector

This class supports string and binary data by value reference -- i.e. each field is explicitly present, as opposed to provided by a dictionary reference. In some cases, all the values will be in the same byte array to begin with, but this need not be the case. If each value is in a separate byte array to start with, or not all of the values are in the same original byte array, you can still assign data by reference into this column vector. This gives flexibility to use this in multiple situations.

When setting data by reference, the caller is responsible for allocating the byte arrays used to hold the data. You can also set data by value, as long as you call the initBuffer() method first. You can mix "by value" and "by reference" in the same column vector, though that use is probably not typical.

另请参阅:

序列化表格

嵌套类概要

从接口继承的嵌套类/接口 org.apache.flink.table.dataformat.vector.BytesColumnVector

BytesColumnVector.Bytes

字段概要

字段

限定符和类型	字段和说明
byte[]	buffer buffer to use when actually copying in data.
int[]	length The length of each field.
int[]	start start offset of each field.

从类继承的字段 org.apache.flink.table.dataformat.vector.heap.AbstractHeapVector

dictionaryIds, isNull

从类继承的字段 org.apache.flink.table.dataformat.vector.AbstractColumnVector

dictionary, noNulls

构造器概要

构造器

构造器和说明
HeapBytesVector(int size) Don't call this constructor except for testing purposes.

方法概要

限定符和类型	方法和说明
BytesColumnVector.Bytes	getBytes(int i)
void	reset() Resets the column to default state
void	setVal(int elementNum, byte[] sourceBuf) Set a field by actually copying in to a local buffer.
void	setVal(int elementNum, byte[] sourceBuf, int start, int length) Set a field by actually copying in to a local buffer.

从类继承的方法 org.apache.flink.table.dataformat.vector.heap.AbstractHeapVector

getDictionaryIds, isNullAt, reserveDictionaryIds, setNullAt

从类继承的方法 org.apache.flink.table.dataformat.vector.AbstractColumnVector

hasDictionary, setDictionary

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.flink.table.dataformat.vector.ColumnVector

isNullAt

字段详细资料

start

public int[] start

start offset of each field.

length

public int[] length

The length of each field.

buffer

public byte[] buffer

buffer to use when actually copying in data.

构造器详细资料

HeapBytesVector

public HeapBytesVector(int size)

Don't call this constructor except for testing purposes.

参数:

size - number of elements in the column vector

方法详细资料

reset

public void reset()

从类复制的说明: AbstractHeapVector

Resets the column to default state. - fills the isNull array with false. - sets noNulls to true.

指定者:

reset 在接口中 ColumnVector

覆盖:

reset 在类中 AbstractHeapVector

setVal

public void setVal(int elementNum,
                   byte[] sourceBuf,
                   int start,
                   int length)

Set a field by actually copying in to a local buffer. If you must actually copy data in to the array, use this method. DO NOT USE this method unless it's not practical to set data by reference with setRef(). Setting data by reference tends to run a lot faster than copying data in.

参数:

elementNum - index within column vector to set

sourceBuf - container of source data

start - start byte position within source

length - length of source byte sequence

setVal

public void setVal(int elementNum,
                   byte[] sourceBuf)

Set a field by actually copying in to a local buffer. If you must actually copy data in to the array, use this method. DO NOT USE this method unless it's not practical to set data by reference with setRef(). Setting data by reference tends to run a lot faster than copying data in.

参数:

elementNum - index within column vector to set

sourceBuf - container of source data

getBytes

public BytesColumnVector.Bytes getBytes(int i)

指定者:

getBytes 在接口中 BytesColumnVector