Package org.apache.druid.math.expr

Class InputBindings.BestEffortInputBindings

java.lang.Object

org.apache.druid.math.expr.InputBindings.BestEffortInputBindings

All Implemented Interfaces:

Expr.InputBindingInspector, Expr.ObjectBinding

Enclosing class:

InputBindings

public abstract static class InputBindings.BestEffortInputBindings
extends Object
implements Expr.ObjectBinding

Expr.ObjectBinding backed by a cache populated by ExprEval.bestEffortOf(Object) for when the input type information is totally unknown, for a single row worth of values. The values are cached so that asking for a type and getting the value of some input do not repeat computations. This type is not thread-safe, and not suitable for re-use for processing multiple-rows due to the presence of the result cache.

Constructor Summary

Constructors

Constructor	Description
BestEffortInputBindings()

Method Summary

Modifier and Type	Method	Description
Object	get(String name)	Get value binding for string identifier of IdentifierExpr
ExpressionType	getType(String name)	Get the ExpressionType from the backing store for a given identifier (this is likely a column, but could be other things depending on the backing adapter)

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.math.expr.Expr.InputBindingInspector

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

Constructor Details

BestEffortInputBindings

public BestEffortInputBindings()

Method Details

get

@Nullable
public Object get(String name)

Description copied from interface: Expr.ObjectBinding

Get value binding for string identifier of IdentifierExpr

Specified by:

get in interface Expr.ObjectBinding

getType

@Nullable
public ExpressionType getType(String name)

Description copied from interface: Expr.InputBindingInspector

Get the ExpressionType from the backing store for a given identifier (this is likely a column, but could be other things depending on the backing adapter)

Specified by:

getType in interface Expr.InputBindingInspector