org.apache.druid.segment.virtual

Class VirtualizedColumnSelectorFactory

java.lang.Object

org.apache.druid.segment.virtual.VirtualizedColumnInspector

org.apache.druid.segment.virtual.VirtualizedColumnSelectorFactory

All Implemented Interfaces:

Expr.InputBindingInspector, ColumnInspector, ColumnSelectorFactory

public class VirtualizedColumnSelectorFactory
extends VirtualizedColumnInspector
implements ColumnSelectorFactory

ColumnSelectorFactory which can create selectors for both virtual and non-virtual columns

Field Summary

Fields inherited from class org.apache.druid.segment.virtual.VirtualizedColumnInspector

baseInspector, virtualColumns

Constructor Summary

Constructors

Constructor and Description
VirtualizedColumnSelectorFactory(ColumnSelectorFactory baseFactory, VirtualColumns virtualColumns)

Method Summary

Modifier and Type	Method and Description
RowIdSupplier	getRowIdSupplier() Returns a RowIdSupplier that allows callers to detect whether the selectors returned by this factory have moved or not.
ColumnValueSelector<?>	makeColumnValueSelector(String columnName) Returns ColumnValueSelector corresponding to the given column name, or NilColumnValueSelector if the column with such name is absent.
DimensionSelector	makeDimensionSelector(DimensionSpec dimensionSpec)

Methods inherited from class org.apache.druid.segment.virtual.VirtualizedColumnInspector

getColumnCapabilities

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.segment.ColumnSelectorFactory

getColumnCapabilities

Methods inherited from interface org.apache.druid.segment.ColumnInspector

getColumnCapabilitiesWithDefault, getType

Methods inherited from interface org.apache.druid.math.expr.Expr.InputBindingInspector

areNumeric, areNumeric, areSameTypes, areSameTypes, areScalar, areScalar, canVectorize, canVectorize

Constructor Detail

VirtualizedColumnSelectorFactory

public VirtualizedColumnSelectorFactory(ColumnSelectorFactory baseFactory,
                                        VirtualColumns virtualColumns)

Method Detail

makeDimensionSelector

public DimensionSelector makeDimensionSelector(DimensionSpec dimensionSpec)

Specified by:

makeDimensionSelector in interface ColumnSelectorFactory

makeColumnValueSelector

public ColumnValueSelector<?> makeColumnValueSelector(String columnName)

Description copied from interface: ColumnSelectorFactory

Returns ColumnValueSelector corresponding to the given column name, or NilColumnValueSelector if the column with such name is absent.

Specified by:

makeColumnValueSelector in interface ColumnSelectorFactory

getRowIdSupplier

@Nullable
public RowIdSupplier getRowIdSupplier()

Description copied from interface: ColumnSelectorFactory

Returns a RowIdSupplier that allows callers to detect whether the selectors returned by this factory have moved or not. Useful for selectors that wrap other selectors, such as virtual columns, as it allows them to cache their outputs.

Specified by:

getRowIdSupplier in interface ColumnSelectorFactory