Package org.apache.drill.exec.vector

Interface VariableWidthVector

All Superinterfaces:

AutoCloseable, Closeable, Iterable<ValueVector>, ValueVector

All Known Implementing Classes:

NullableVar16CharVector, NullableVarBinaryVector, NullableVarCharVector, NullableVarDecimalVector, Var16CharVector, VarBinaryVector, VarCharVector, VarDecimalVector

public interface VariableWidthVector
extends ValueVector

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	VariableWidthVector.VariableWidthAccessor
static interface	VariableWidthVector.VariableWidthMutator

Nested classes/interfaces inherited from interface org.apache.drill.exec.vector.ValueVector

ValueVector.Accessor, ValueVector.Mutator

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_RECORD_BYTE_COUNT
static final int	MIN_BYTE_COUNT
static final MaterializedField	offsetsField

Fields inherited from interface org.apache.drill.exec.vector.ValueVector

BITS_VECTOR_NAME, MAX_BUFFER_SIZE, MAX_ROW_COUNT, MIN_ROW_COUNT, OFFSETS_VECTOR_NAME, VALUES_VECTOR_NAME

Method Summary

Modifier and Type	Method	Description
void	allocateNew(int totalBytes, int valueCount)	Allocate a new memory space for this vector.
VariableWidthVector.VariableWidthAccessor	getAccessor()	Returns an accessor that is used to read from this vector instance.
int	getByteCapacity()	Provide the maximum amount of variable width bytes that can be stored int his vector.
int	getCurrentSizeInBytes()
VariableWidthVector.VariableWidthMutator	getMutator()	Returns an mutator that is used to write to this vector instance.
UInt4Vector	getOffsetVector()

Methods inherited from interface java.lang.Iterable

forEach, iterator, spliterator

Methods inherited from interface org.apache.drill.exec.vector.ValueVector

allocateNew, allocateNewSafe, clear, close, collectLedgers, copyEntry, exchange, getAllocatedSize, getAllocator, getBuffers, getBufferSize, getBufferSizeFor, getField, getMetadata, getPayloadByteCount, getReader, getTransferPair, getTransferPair, getValueCapacity, load, makeTransferPair, setInitialCapacity, toNullable

Field Details

DEFAULT_RECORD_BYTE_COUNT

static final int DEFAULT_RECORD_BYTE_COUNT

See Also:

• Constant Field Values

MIN_BYTE_COUNT

static final int MIN_BYTE_COUNT

See Also:

• Constant Field Values

offsetsField

static final MaterializedField offsetsField

Method Details

allocateNew

void allocateNew(int totalBytes,
 int valueCount)

Allocate a new memory space for this vector. Must be called prior to using the ValueVector.

Parameters:

totalBytes - Desired size of the underlying data buffer.

valueCount - Number of values in the vector.

getByteCapacity

int getByteCapacity()

Provide the maximum amount of variable width bytes that can be stored int his vector.

Returns:

getMutator

VariableWidthVector.VariableWidthMutator getMutator()

Description copied from interface: ValueVector

Returns an mutator that is used to write to this vector instance.

Specified by:

getMutator in interface ValueVector

getAccessor

VariableWidthVector.VariableWidthAccessor getAccessor()

Description copied from interface: ValueVector

Returns an accessor that is used to read from this vector instance.

Specified by:

getAccessor in interface ValueVector

getCurrentSizeInBytes

int getCurrentSizeInBytes()

getOffsetVector

UInt4Vector getOffsetVector()