org.apache.iotdb.tsfile.read.common.block

Class TsBlock

java.lang.Object

org.apache.iotdb.tsfile.read.common.block.TsBlock

public class TsBlock
extends Object

Intermediate result for most of ExecOperators. The Tablet contains data from one or more columns and constructs them as a row based view The columns can be series, aggregation result for one series or scalar value (such as deviceName). The Tablet also contains the metadata to describe the columns.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	TsBlock.TsBlockRowIterator Mainly used for UDF framework.
class	TsBlock.TsBlockSingleColumnIterator

Field Summary

Fields

Modifier and Type	Field and Description
static int	INSTANCE_SIZE

Constructor Summary

Constructors

Constructor and Description
TsBlock(int positionCount)
TsBlock(int positionCount, TimeColumn timeColumn, Column... valueColumns)
TsBlock(TimeColumn timeColumn, Column... valueColumns)

Method Summary

Modifier and Type	Method and Description
TsBlock	appendValueColumn(Column column)
Column	getColumn(int columnIndex)
Column[]	getColumns(int[] columnIndexes)
long	getEndTime()
int	getPositionCount()
TsBlock	getRegion(int positionOffset, int length)
long	getRetainedSizeInBytes()
long	getStartTime()
Column[]	getTimeAndValueColumn(int columnIndex)
long	getTimeByIndex(int index)
TimeColumn	getTimeColumn()
org.apache.iotdb.tsfile.read.common.block.TsBlock.TsBlockAlignedRowIterator	getTsBlockAlignedRowIterator() Only used for the batch data of vector time series.
TsBlock.TsBlockRowIterator	getTsBlockRowIterator()
TsBlock.TsBlockSingleColumnIterator	getTsBlockSingleColumnIterator()
TsBlock.TsBlockSingleColumnIterator	getTsBlockSingleColumnIterator(int columnIndex)
int	getValueColumnCount()
TsBlock	insertValueColumn(int index, Column column) Attention.
boolean	isEmpty()
void	reverse()
TsBlock	subTsBlock(int fromIndex) This method will create a temporary view of origin tsBlock, which will reuse the arrays of columns but with different offset.
static TsBlock	wrapBlocksWithoutCopy(int positionCount, TimeColumn timeColumn, Column[] valueColumns) Visible to give trusted classes like TsBlockBuilder access to a constructor that doesn't defensively copy the valueColumns

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE_SIZE

public static final int INSTANCE_SIZE

Constructor Detail

TsBlock

public TsBlock(int positionCount)

TsBlock

public TsBlock(TimeColumn timeColumn,
               Column... valueColumns)

TsBlock

public TsBlock(int positionCount,
               TimeColumn timeColumn,
               Column... valueColumns)

Method Detail

wrapBlocksWithoutCopy

public static TsBlock wrapBlocksWithoutCopy(int positionCount,
                                            TimeColumn timeColumn,
                                            Column[] valueColumns)

Visible to give trusted classes like TsBlockBuilder access to a constructor that doesn't defensively copy the valueColumns

getPositionCount

public int getPositionCount()

getStartTime

public long getStartTime()

getEndTime

public long getEndTime()

isEmpty

public boolean isEmpty()

getRetainedSizeInBytes

public long getRetainedSizeInBytes()

getRegion

public TsBlock getRegion(int positionOffset,
                         int length)

Parameters:

positionOffset - start offset

length - slice length

Returns:

view of current TsBlock start from positionOffset to positionOffset + length

appendValueColumn

public TsBlock appendValueColumn(Column column)

insertValueColumn

public TsBlock insertValueColumn(int index,
                                 Column column)

Attention. This method uses System.arraycopy() to extend the valueColumn array, so its performance is not ensured if you have many insert operations.

subTsBlock

public TsBlock subTsBlock(int fromIndex)

This method will create a temporary view of origin tsBlock, which will reuse the arrays of columns but with different offset. It can be used where you want to skip some points when getting iterator.

getTimeByIndex

public long getTimeByIndex(int index)

getValueColumnCount

public int getValueColumnCount()

getTimeColumn

public TimeColumn getTimeColumn()

getColumn

public Column getColumn(int columnIndex)

getTimeAndValueColumn

public Column[] getTimeAndValueColumn(int columnIndex)

getColumns

public Column[] getColumns(int[] columnIndexes)

getTsBlockSingleColumnIterator

public TsBlock.TsBlockSingleColumnIterator getTsBlockSingleColumnIterator()

getTsBlockSingleColumnIterator

public TsBlock.TsBlockSingleColumnIterator getTsBlockSingleColumnIterator(int columnIndex)

reverse

public void reverse()

getTsBlockRowIterator

public TsBlock.TsBlockRowIterator getTsBlockRowIterator()

getTsBlockAlignedRowIterator

public org.apache.iotdb.tsfile.read.common.block.TsBlock.TsBlockAlignedRowIterator getTsBlockAlignedRowIterator()

Only used for the batch data of vector time series.