org.apache.drill.exec.vector

Class BaseValueVector

java.lang.Object

org.apache.drill.exec.vector.BaseValueVector

All Implemented Interfaces:

Closeable, AutoCloseable, Iterable<ValueVector>, ValueVector

Direct Known Subclasses:

BaseDataValueVector, BaseRepeatedValueVector, ObjectVector

public abstract class BaseValueVector
extends Object
implements ValueVector

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	BaseValueVector.BaseAccessor
static class	BaseValueVector.BaseMutator

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

ValueVector.Accessor, ValueVector.Mutator

Field Summary

Fields

Modifier and Type	Field and Description
protected BufferAllocator	allocator
protected MaterializedField	field
static int	INITIAL_VALUE_ALLOCATION
static int	MAX_ALLOCATION_SIZE Deprecated.

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

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BaseValueVector(MaterializedField field, BufferAllocator allocator)

Method Summary

Modifier and Type	Method and Description
static boolean	checkBufRefs(ValueVector vv)
void	clear() Release the underlying DrillBuf and reset the ValueVector to empty.
void	close() Alternative to clear().
static void	fillBitsVector(UInt1Vector bits, int valueCount)
BufferAllocator	getAllocator()
MaterializedField	getField() Get information about how this field is materialized.
MaterializedField	getField(String ref)
UserBitShared.SerializedField	getMetadata() Get the metadata for this field.
protected UserBitShared.SerializedField.Builder	getMetadataBuilder()
TransferPair	getTransferPair(BufferAllocator allocator) Returns a transfer pair, creating a new target vector of the same type.
Iterator<ValueVector>	iterator()
void	toNullable(ValueVector nullableVector) Convert a non-nullable vector to nullable by shuffling the data from one to the other.
String	toString()

Methods inherited from class java.lang.Object

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

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

allocateNew, allocateNewSafe, collectLedgers, copyEntry, exchange, getAccessor, getAllocatedSize, getBuffers, getBufferSize, getBufferSizeFor, getMutator, getPayloadByteCount, getReader, getTransferPair, getValueCapacity, load, makeTransferPair, setInitialCapacity

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

MAX_ALLOCATION_SIZE

@Deprecated
public static final int MAX_ALLOCATION_SIZE

Deprecated.

Physical maximum allocation. This is the value prior to Drill 1.11. This size causes memory fragmentation. Please use ValueVector.MAX_BUFFER_SIZE in new code.

See Also:

Constant Field Values

INITIAL_VALUE_ALLOCATION

public static final int INITIAL_VALUE_ALLOCATION

See Also:

Constant Field Values

allocator

protected final BufferAllocator allocator

field

protected final MaterializedField field

Constructor Detail

BaseValueVector

protected BaseValueVector(MaterializedField field,
                          BufferAllocator allocator)

Method Detail

toString

public String toString()

Overrides:

toString in class Object

clear

public void clear()

Description copied from interface: ValueVector

Release the underlying DrillBuf and reset the ValueVector to empty.

Specified by:

clear in interface ValueVector

close

public void close()

Description copied from interface: ValueVector

Alternative to clear(). Allows use as an AutoCloseable in try-with-resources.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in interface ValueVector

getField

public MaterializedField getField()

Description copied from interface: ValueVector

Get information about how this field is materialized.

Specified by:

getField in interface ValueVector

getField

public MaterializedField getField(String ref)

getTransferPair

public TransferPair getTransferPair(BufferAllocator allocator)

Description copied from interface: ValueVector

Returns a transfer pair, creating a new target vector of the same type.

Specified by:

getTransferPair in interface ValueVector

getMetadata

public UserBitShared.SerializedField getMetadata()

Description copied from interface: ValueVector

Get the metadata for this field. Used in serialization

Specified by:

getMetadata in interface ValueVector

Returns:

FieldMetadata for this field.

getMetadataBuilder

protected UserBitShared.SerializedField.Builder getMetadataBuilder()

iterator

public Iterator<ValueVector> iterator()

Specified by:

iterator in interface Iterable<ValueVector>

checkBufRefs

public static boolean checkBufRefs(ValueVector vv)

getAllocator

public BufferAllocator getAllocator()

Specified by:

getAllocator in interface ValueVector

fillBitsVector

public static void fillBitsVector(UInt1Vector bits,
                                  int valueCount)

toNullable

public void toNullable(ValueVector nullableVector)

Description copied from interface: ValueVector

Convert a non-nullable vector to nullable by shuffling the data from one to the other. Avoids the need to generate copy code just to change mode. If this vector is non-nullable, accepts a nullable dual (same minor type, different mode.) If the vector is non-nullable, or non-scalar, then throws an exception.

Specified by:

toNullable in interface ValueVector

Parameters:

nullableVector - nullable vector of the same minor type as this vector