AllNullColumnSelectorFactory (druid-processing 28.0.1 API)

java.lang.Object
- org.apache.druid.segment.join.filter.AllNullColumnSelectorFactory

All Implemented Interfaces:: Expr.InputBindingInspector, ColumnInspector, ColumnSelectorFactory

public class AllNullColumnSelectorFactory
extends Object
implements ColumnSelectorFactory

Constructor Summary

Constructors
Constructor Description

AllNullColumnSelectorFactory()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`ColumnCapabilities`	`getColumnCapabilities(String columnName)`	Returns capabilities of a particular column, if known.
`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 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.druid.segment.ColumnInspector
getColumnCapabilitiesWithDefault, getType

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

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

- Constructor Detail
  - AllNullColumnSelectorFactory
```
public AllNullColumnSelectorFactory()
```
- 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
  - getColumnCapabilities
```
public ColumnCapabilities getColumnCapabilities(String columnName)
```
    Description copied from interface: ColumnSelectorFactory
    
    Returns capabilities of a particular column, if known. May be null if the column doesn't exist, or if the column does exist but the capabilities are unknown. The latter is possible with dynamically discovered columns.
    
    Specified by:
    
    getColumnCapabilities in interface ColumnInspector
    
    Specified by:
    
    getColumnCapabilities in interface ColumnSelectorFactory
    
    Parameters:
    
    columnName - column name
    
    Returns:
    
    capabilities, or null