org.apache.druid.segment.virtual

Class ExpressionVectorValueSelector

java.lang.Object

org.apache.druid.segment.virtual.ExpressionVectorValueSelector

All Implemented Interfaces:

VectorSizeInspector, VectorValueSelector

public class ExpressionVectorValueSelector
extends Object
implements VectorValueSelector

Constructor Summary

Constructors

Constructor and Description
ExpressionVectorValueSelector(ExprVectorProcessor<?> processor, Expr.VectorInputBinding bindings)

Method Summary

Modifier and Type	Method and Description
int	getCurrentVectorSize() Returns the current vector size for this cursor.
double[]	getDoubleVector() Get the current vector, casting to doubles as necessary.
float[]	getFloatVector() Get the current vector, casting to floats as necessary.
long[]	getLongVector() Get the current vector, casting to longs as necessary.
int	getMaxVectorSize() Returns the maximum vector size for this cursor.
boolean[]	getNullVector() Gets a vector of booleans signifying which rows are null and which are not (true for null).

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionVectorValueSelector

public ExpressionVectorValueSelector(ExprVectorProcessor<?> processor,
                                     Expr.VectorInputBinding bindings)

Method Detail

getLongVector

public long[] getLongVector()

Description copied from interface: VectorValueSelector

Get the current vector, casting to longs as necessary. The array will be reused, so it is not a good idea to retain a reference to it.

Specified by:

getLongVector in interface VectorValueSelector

getFloatVector

public float[] getFloatVector()

Description copied from interface: VectorValueSelector

Get the current vector, casting to floats as necessary. The array will be reused, so it is not a good idea to retain a reference to it.

Specified by:

getFloatVector in interface VectorValueSelector

getDoubleVector

public double[] getDoubleVector()

Description copied from interface: VectorValueSelector

Get the current vector, casting to doubles as necessary. The array will be reused, so it is not a good idea to retain a reference to it.

Specified by:

getDoubleVector in interface VectorValueSelector

getNullVector

@Nullable
public boolean[] getNullVector()

Description copied from interface: VectorValueSelector

Gets a vector of booleans signifying which rows are null and which are not (true for null). Returns null if it is known that there are no nulls in the vector, possibly because the column is non-nullable.

Specified by:

getNullVector in interface VectorValueSelector

getMaxVectorSize

public int getMaxVectorSize()

Description copied from interface: VectorSizeInspector

Returns the maximum vector size for this cursor. It will not change for the lifetime of this cursor, and is generally used to allocate scratch arrays for later processing. Will always be greater than zero.

Specified by:

getMaxVectorSize in interface VectorSizeInspector

getCurrentVectorSize

public int getCurrentVectorSize()

Description copied from interface: VectorSizeInspector

Returns the current vector size for this cursor. Will never be larger than the max size returned by VectorSizeInspector.getMaxVectorSize().

Specified by:

getCurrentVectorSize in interface VectorSizeInspector