com.facebook.presto.common.block

Class RowBlock

java.lang.Object

com.facebook.presto.common.block.AbstractRowBlock

com.facebook.presto.common.block.RowBlock

All Implemented Interfaces:

Block, UncheckedBlock

public class RowBlock
extends AbstractRowBlock
implements Block

Field Summary

Fields inherited from class com.facebook.presto.common.block.AbstractRowBlock

numFields

Method Summary

Modifier and Type	Method and Description
static Block	fromFieldBlocks(int positionCount, Optional<boolean[]> rowIsNullOptional, Block[] fieldBlocks) Create a row block directly from columnar nulls and field blocks.
protected int[]	getFieldBlockOffsets()
Block	getLoadedBlock() Returns a block that assures all data is in memory.
long	getLogicalSizeInBytes() Returns the size of the block contents, regardless of internal representation.
int	getOffsetBase()
int	getPositionCount() Returns the number of positions in this block.
protected Block[]	getRawFieldBlocks()
long	getRetainedSizeInBytes() Returns the retained size of this block in memory, including over-allocations.
protected boolean[]	getRowIsNull()
long	getSizeInBytes() Returns the size of this block as if it was compacted, ignoring any over-allocations.
boolean	isNull(int position) Is the specified position null?
boolean	mayHaveNull() Is it possible the block may have a null value? If false, the block can not contain a null, but if true, the block may or may not have a null.
void	retainedBytesForEachPart(BiConsumer<Object,Long> consumer) consumer visits each of the internal data container and accepts the size for it.
String	toString()

Methods inherited from class com.facebook.presto.common.block.AbstractRowBlock

appendNull, checkReadablePosition, copyPositions, copyRegion, fixedSizeInBytesPerPosition, getApproximateRegionLogicalSizeInBytes, getBlock, getBlockUnchecked, getEncodingName, getEstimatedDataSizeForStats, getFieldBlockOffset, getPositionsSizeInBytes, getRegion, getRegionLogicalSizeInBytes, getRegionSizeInBytes, getSingleValueBlock, isNullUnchecked, writePositionTo, writePositionTo

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.facebook.presto.common.block.Block

appendNull, bytesCompare, bytesEqual, compareTo, copyPositions, copyRegion, equals, fixedSizeInBytesPerPosition, getApproximateRegionLogicalSizeInBytes, getBlock, getByte, getEncodingName, getEstimatedDataSizeForStats, getInt, getLong, getLong, getPositions, getPositionsSizeInBytes, getRegion, getRegionLogicalSizeInBytes, getRegionSizeInBytes, getShort, getSingleValueBlock, getSlice, getSliceLength, hash, writeBytesTo, writeBytesTo, writePositionTo, writePositionTo

Methods inherited from interface com.facebook.presto.common.block.UncheckedBlock

getBlockUnchecked, getByteUnchecked, getIntUnchecked, getLongUnchecked, getLongUnchecked, getShortUnchecked, getSliceLengthUnchecked, getSliceUnchecked, isNullUnchecked

Method Detail

fromFieldBlocks

public static Block fromFieldBlocks(int positionCount,
                                    Optional<boolean[]> rowIsNullOptional,
                                    Block[] fieldBlocks)

Create a row block directly from columnar nulls and field blocks.

getRawFieldBlocks

protected Block[] getRawFieldBlocks()

Specified by:

getRawFieldBlocks in class AbstractRowBlock

getFieldBlockOffsets

protected int[] getFieldBlockOffsets()

Specified by:

getFieldBlockOffsets in class AbstractRowBlock

getOffsetBase

public int getOffsetBase()

Specified by:

getOffsetBase in interface UncheckedBlock

Specified by:

getOffsetBase in class AbstractRowBlock

Returns:

the internal offset of the underlying data structure of this block

getRowIsNull

@Nullable
protected boolean[] getRowIsNull()

Specified by:

getRowIsNull in class AbstractRowBlock

Returns:

the underlying rowIsNull array, or null when all rows are guaranteed to be non-null

mayHaveNull

public boolean mayHaveNull()

Description copied from interface: Block

Is it possible the block may have a null value? If false, the block can not contain a null, but if true, the block may or may not have a null.

Specified by:

mayHaveNull in interface Block

Overrides:

mayHaveNull in class AbstractRowBlock

isNull

public boolean isNull(int position)

Description copied from interface: Block

Is the specified position null?

Specified by:

isNull in interface Block

getPositionCount

public int getPositionCount()

Description copied from interface: Block

Returns the number of positions in this block.

Specified by:

getPositionCount in interface Block

getSizeInBytes

public long getSizeInBytes()

Description copied from interface: Block

Returns the size of this block as if it was compacted, ignoring any over-allocations. For example, in dictionary blocks, this only counts each dictionary entry once, rather than each time a value is referenced.

Specified by:

getSizeInBytes in interface Block

getLogicalSizeInBytes

public long getLogicalSizeInBytes()

Description copied from interface: Block

Returns the size of the block contents, regardless of internal representation. The same logical data values should always have the same size, no matter what block type is used or how they are represented within a specific block. This can differ substantially from Block.getSizeInBytes() for certain block types. For RLE, it will be N times larger. For dictionary, it will be larger based on how many times dictionary entries are reused.

Specified by:

getLogicalSizeInBytes in interface Block

getRetainedSizeInBytes

public long getRetainedSizeInBytes()

Description copied from interface: Block

Returns the retained size of this block in memory, including over-allocations. This method is called from the inner most execution loop and must be fast.

Specified by:

getRetainedSizeInBytes in interface Block

retainedBytesForEachPart

public void retainedBytesForEachPart(BiConsumer<Object,Long> consumer)

Description copied from interface: Block

consumer visits each of the internal data container and accepts the size for it. This method can be helpful in cases such as memory counting for internal data structure. Also, the method should be non-recursive, only visit the elements at the top level, and specifically should not call retainedBytesForEachPart on nested blocks consumer should be called at least once with the current block and must include the instance size of the current block

Specified by:

retainedBytesForEachPart in interface Block

toString

public String toString()

Overrides:

toString in class Object

getLoadedBlock

public Block getLoadedBlock()

Description copied from interface: Block

Returns a block that assures all data is in memory. May return the same block if all block data is already in memory.

This allows streaming data sources to skip sections that are not accessed in a query.

Specified by:

getLoadedBlock in interface Block