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

Description

VirtualizedColumnSelectorFactory(ColumnSelectorFactory baseFactory, VirtualColumns virtualColumns)
Method Summary

Modifier and Type

Method

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.ColumnInspector
getType

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

Methods inherited from interface org.apache.druid.math.expr.Expr.InputBindingInspector
areNumeric, areNumeric, areSameTypes, areSameTypes, areScalar, areScalar, canVectorize, canVectorize

Constructor Details
- VirtualizedColumnSelectorFactory
  
  public VirtualizedColumnSelectorFactory(ColumnSelectorFactory baseFactory, VirtualColumns virtualColumns)
Method Details
- 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

Class VirtualizedColumnSelectorFactory

Field Summary