com.facebook.presto.common.block

Class ArrayBlock

java.lang.Object

com.facebook.presto.common.block.AbstractArrayBlock

com.facebook.presto.common.block.ArrayBlock

All Implemented Interfaces:

Block, UncheckedBlock

public class ArrayBlock
extends AbstractArrayBlock

Nested Class Summary

Nested classes/interfaces inherited from class com.facebook.presto.common.block.AbstractArrayBlock

AbstractArrayBlock.ArrayBlockFunction<T>

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
static Block	fromElementBlock(int positionCount, Optional<boolean[]> valueIsNullOptional, int[] arrayOffset, Block values) Create an array block directly from columnar nulls, values, and offsets into the values.
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()
protected int[]	getOffsets()
int	getPositionCount() Returns the number of positions in this block.
protected Block	getRawElementBlock()
long	getRetainedSizeInBytes() Returns the retained size of this block in memory, including over-allocations.
Block	getSingleValueBlock(int position) Gets the value at the specified position as a single element block.
long	getSizeInBytes() Returns the size of this block as if it was compacted, ignoring any over-allocations.
protected boolean[]	getValueIsNull()
int	hashCode()
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(ObjLongConsumer<Object> 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.AbstractArrayBlock

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

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

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

bytesCompare, bytesEqual, compareTo, equals, getByte, getInt, getLong, getLong, getPositions, getShort, getSlice, getSliceLength, hash, writeBytesTo, writeBytesTo

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

getByteUnchecked, getIntUnchecked, getLongUnchecked, getLongUnchecked, getShortUnchecked, getSliceLengthUnchecked, getSliceUnchecked

Method Detail

fromElementBlock

public static Block fromElementBlock(int positionCount,
                                     Optional<boolean[]> valueIsNullOptional,
                                     int[] arrayOffset,
                                     Block values)

Create an array block directly from columnar nulls, values, and offsets into the values. A null array must have no entries.

getPositionCount

public int getPositionCount()

Description copied from interface: Block

Returns the number of positions in this 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.

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.

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.

retainedBytesForEachPart

public void retainedBytesForEachPart(ObjLongConsumer<Object> 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

getRawElementBlock

protected Block getRawElementBlock()

Specified by:

getRawElementBlock in class AbstractArrayBlock

getOffsets

protected int[] getOffsets()

Specified by:

getOffsets in class AbstractArrayBlock

getOffsetBase

public int getOffsetBase()

Specified by:

getOffsetBase in interface UncheckedBlock

Specified by:

getOffsetBase in class AbstractArrayBlock

Returns:

the internal offset of the underlying data structure of this block

getValueIsNull

@Nullable
protected boolean[] getValueIsNull()

Specified by:

getValueIsNull in class AbstractArrayBlock

Returns:

the underlying valueIsNull array, or null when all values 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 AbstractArrayBlock

isNull

public boolean isNull(int position)

Description copied from interface: Block

Is the specified position null?

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.

getSingleValueBlock

public Block getSingleValueBlock(int position)

Description copied from interface: Block

Gets the value at the specified position as a single element block. The returned block should retain only the memory required for a single block.

This method is useful for operators that hold on to a single value without holding on to the entire block.

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object