Package org.apache.flink.table.data.columnar.vector.heap

Class HeapBytesVector

java.lang.Object

org.apache.flink.table.data.columnar.vector.writable.AbstractWritableVector

org.apache.flink.table.data.columnar.vector.heap.AbstractHeapVector

org.apache.flink.table.data.columnar.vector.heap.HeapBytesVector

All Implemented Interfaces:

Serializable, BytesColumnVector, ColumnVector, WritableBytesVector, WritableColumnVector

@Internal
public class HeapBytesVector
extends AbstractHeapVector
implements WritableBytesVector

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.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.table.data.columnar.vector.BytesColumnVector

BytesColumnVector.Bytes

Field Summary

Fields

Modifier and Type	Field	Description
byte[]	buffer	buffer to use when actually copying in data.
int[]	length	The length of each field.
int[]	start	start offset of each field.

Fields inherited from class org.apache.flink.table.data.columnar.vector.heap.AbstractHeapVector

BYTE_ARRAY_OFFSET, dictionaryIds, DOUBLE_ARRAY_OFFSET, FLOAT_ARRAY_OFFSET, INT_ARRAY_OFFSET, isNull, LITTLE_ENDIAN, LONG_ARRAY_OFFSET, UNSAFE

Fields inherited from class org.apache.flink.table.data.columnar.vector.writable.AbstractWritableVector

dictionary, noNulls

Constructor Summary

Constructors

Constructor	Description
HeapBytesVector(int size)	Don't call this constructor except for testing purposes.

Method Summary

Modifier and Type	Method	Description
void	appendBytes(int elementNum, byte[] sourceBuf, int start, int length)	Append byte[] at rowId with the provided value.
void	fill(byte[] value)	Fill the column vector with the provided value.
BytesColumnVector.Bytes	getBytes(int i)
void	reset()	Resets the column to default state. - fills the isNull array with false. - sets noNulls to true.

Methods inherited from class org.apache.flink.table.data.columnar.vector.heap.AbstractHeapVector

fillWithNulls, getDictionaryIds, getLen, isNullAt, reserveDictionaryIds, setNullAt, setNulls

Methods inherited from class org.apache.flink.table.data.columnar.vector.writable.AbstractWritableVector

hasDictionary, setDictionary

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.table.data.columnar.vector.ColumnVector

isNullAt

Methods inherited from interface org.apache.flink.table.data.columnar.vector.writable.WritableColumnVector

fillWithNulls, getDictionaryIds, hasDictionary, reserveDictionaryIds, setDictionary, setNullAt, setNulls

Field Details

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.

Constructor Details

HeapBytesVector

public HeapBytesVector(int size)

Don't call this constructor except for testing purposes.

Parameters:

size - number of elements in the column vector

Method Details

reset

public void reset()

Description copied from class: AbstractHeapVector

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

Specified by:

reset in interface WritableColumnVector

Overrides:

reset in class AbstractHeapVector

appendBytes

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

Description copied from interface: WritableBytesVector

Append byte[] at rowId with the provided value. Note: Must append values according to the order of rowId, can not random append.

Specified by:

appendBytes in interface WritableBytesVector

fill

public void fill(byte[] value)

Description copied from interface: WritableBytesVector

Fill the column vector with the provided value.

Specified by:

fill in interface WritableBytesVector

getBytes

public BytesColumnVector.Bytes getBytes(int i)

Specified by:

getBytes in interface BytesColumnVector