org.apache.druid.segment

Interface ColumnInspector

All Superinterfaces:

Expr.InputBindingInspector

All Known Subinterfaces:

ColumnSelectorFactory, StorageAdapter, VectorColumnSelectorFactory

All Known Implementing Classes:

AllNullColumnSelectorFactory, HashJoinSegmentStorageAdapter, IncrementalIndexStorageAdapter, IndexedTableColumnSelectorFactory, LookupColumnSelectorFactory, QueryableIndexColumnSelectorFactory, QueryableIndexStorageAdapter, QueryableIndexVectorColumnSelectorFactory, RowBasedColumnSelectorFactory, RowBasedStorageAdapter, RowSignature, VirtualizedColumnInspector, VirtualizedColumnSelectorFactory

public interface ColumnInspector
extends Expr.InputBindingInspector

Method Summary

Modifier and Type	Method and Description
ColumnCapabilities	getColumnCapabilities(String column) Returns capabilities of a particular column.
default ExprType	getType(String name)

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

areNumeric, areNumeric, areScalar, areScalar, canVectorize, canVectorize

Method Detail

getColumnCapabilities

@Nullable
ColumnCapabilities getColumnCapabilities(String column)

Returns capabilities of a particular column.

Parameters:

column - column name

Returns:

capabilities, or null

getType

@Nullable
default ExprType getType(String name)

Specified by:

getType in interface Expr.InputBindingInspector