Package org.apache.flink.table.runtime.hashtable

Class LongHashPartition

java.lang.Object

org.apache.flink.runtime.memory.AbstractPagedInputView

org.apache.flink.table.runtime.hashtable.LongHashPartition

All Implemented Interfaces:

DataInput, org.apache.flink.core.memory.DataInputView, org.apache.flink.core.memory.SeekableDataInputView

public class LongHashPartition
extends org.apache.flink.runtime.memory.AbstractPagedInputView
implements org.apache.flink.core.memory.SeekableDataInputView

Partition for LongHybridHashTable.

The layout of the buckets inside a memory segment is as follows:

Hash mode: +----------------------------- Bucket area ---------------------------- | long key (8 bytes) | address (8 bytes) | | long key (8 bytes) | address (8 bytes) | | long key (8 bytes) | address (8 bytes) | | ... +----------------------------- Data area -------------------------- | size & address of next row with the same key (8bytes) | binary row | | size & address of next row with the same key (8bytes) | binary row | | size & address of next row with the same key (8bytes) | binary row | | ...

Dense mode: +----------------------------- Bucket area ---------------------------- | address1 (8 bytes) | address2 (8 bytes) | address3 (8 bytes) | ... Directly addressed by the index of the corresponding array of key values.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	LongHashPartition.MatchIterator	Iterator for probe match.

Field Summary

Fields inherited from class org.apache.flink.runtime.memory.AbstractPagedInputView

headerLength

Method Summary

Modifier and Type	Method	Description
static void	deserializeFromPages(org.apache.flink.table.data.binary.BinaryRowData reuse, org.apache.flink.runtime.io.disk.iomanager.ChannelReaderInputView inView, BinaryRowDataSerializer buildSideSerializer)
LongHashPartition.MatchIterator	get(long key, int hashCode)	Returns an iterator for all the values for the given key, or null if no value found.
org.apache.flink.core.memory.MemorySegment[]	getBuckets()
protected int	getLimitForSegment(org.apache.flink.core.memory.MemorySegment segment)
protected org.apache.flink.core.memory.MemorySegment	nextSegment(org.apache.flink.core.memory.MemorySegment current)
void	serializeToPages(org.apache.flink.table.data.binary.BinaryRowData row)
void	setReadPosition(long pointer)

Methods inherited from class org.apache.flink.runtime.memory.AbstractPagedInputView

advance, clear, doAdvance, getCurrentPositionInSegment, getCurrentSegment, getCurrentSegmentLimit, getHeaderLength, read, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, seekInput, skipBytes, skipBytesToRead

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.io.DataInput

readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, skipBytes

Methods inherited from interface org.apache.flink.core.memory.DataInputView

read, read, skipBytesToRead

Method Detail

get

public LongHashPartition.MatchIterator get(long key,
                                           int hashCode)

Returns an iterator for all the values for the given key, or null if no value found.

getBuckets

public org.apache.flink.core.memory.MemorySegment[] getBuckets()

setReadPosition

public void setReadPosition(long pointer)

Specified by:

setReadPosition in interface org.apache.flink.core.memory.SeekableDataInputView

nextSegment

protected org.apache.flink.core.memory.MemorySegment nextSegment(org.apache.flink.core.memory.MemorySegment current)
                                                          throws IOException

Specified by:

nextSegment in class org.apache.flink.runtime.memory.AbstractPagedInputView

Throws:

IOException

getLimitForSegment

protected int getLimitForSegment(org.apache.flink.core.memory.MemorySegment segment)

Specified by:

getLimitForSegment in class org.apache.flink.runtime.memory.AbstractPagedInputView

serializeToPages

public void serializeToPages(org.apache.flink.table.data.binary.BinaryRowData row)
                      throws IOException

Throws:

IOException

deserializeFromPages

public static void deserializeFromPages(org.apache.flink.table.data.binary.BinaryRowData reuse,
                                        org.apache.flink.runtime.io.disk.iomanager.ChannelReaderInputView inView,
                                        BinaryRowDataSerializer buildSideSerializer)
                                 throws IOException

Throws:

IOException