Package org.apache.druid.query.filter

Interface ColumnIndexSelector

All Superinterfaces:

ColumnInspector, ColumnSelector, Expr.InputBindingInspector

All Known Implementing Classes:

ColumnCache

public interface ColumnIndexSelector
extends ColumnSelector

Method Summary

Modifier and Type	Method	Description
BitmapFactory	getBitmapFactory()
ColumnIndexSupplier	getIndexSupplier(String column)	Get the ColumnIndexSupplier of a column.
int	getNumRows()

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

getType

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

getColumnCapabilities, getColumnHolder

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

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

Method Details

getNumRows

int getNumRows()

getBitmapFactory

BitmapFactory getBitmapFactory()

getIndexSupplier

@Nullable
ColumnIndexSupplier getIndexSupplier(String column)

Get the ColumnIndexSupplier of a column. If the column exists, but does not support indexes, this method will return a non-null index supplier, likely NoIndexesColumnIndexSupplier. Columns which are 'missing' will return a null value from this method, which allows for filters to act on this information to produce an all true or all false index depending on how the filter matches the null value.