Package org.apache.druid.query.rowsandcols.semantic

Class DefaultColumnSelectorFactoryMaker.ColumnAccessorBasedColumnSelectorFactory

java.lang.Object

org.apache.druid.query.rowsandcols.semantic.DefaultColumnSelectorFactoryMaker.ColumnAccessorBasedColumnSelectorFactory

All Implemented Interfaces:

Expr.InputBindingInspector, ColumnInspector, ColumnSelectorFactory

Enclosing class:

DefaultColumnSelectorFactoryMaker

public static class DefaultColumnSelectorFactoryMaker.ColumnAccessorBasedColumnSelectorFactory
extends Object
implements ColumnSelectorFactory

Constructor Summary

Constructors

Constructor	Description
ColumnAccessorBasedColumnSelectorFactory(AtomicInteger cellIdSupplier, RowsAndColumns rac)

Method Summary

Modifier and Type	Method	Description
ColumnCapabilities	getColumnCapabilities(String column)	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

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 Details

ColumnAccessorBasedColumnSelectorFactory

public ColumnAccessorBasedColumnSelectorFactory(AtomicInteger cellIdSupplier,
 RowsAndColumns rac)

Method Details

makeDimensionSelector

public DimensionSelector makeDimensionSelector(DimensionSpec dimensionSpec)

Specified by:

makeDimensionSelector in interface ColumnSelectorFactory

makeColumnValueSelector

public ColumnValueSelector makeColumnValueSelector(@Nonnull
 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

@Nullable
public ColumnCapabilities getColumnCapabilities(String column)

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:

column - column name

Returns:

capabilities, or null