Package org.apache.druid.math.expr

Interface ApplyFunction.IndexableFoldLambdaBinding

All Superinterfaces:

Expr.InputBindingInspector, Expr.ObjectBinding

All Known Implementing Classes:

ApplyFunction.CartesianFoldLambdaBinding, ApplyFunction.FoldLambdaBinding

Enclosing interface:

ApplyFunction

public static interface ApplyFunction.IndexableFoldLambdaBinding
extends Expr.ObjectBinding

Expr.ObjectBinding which can be iterated by an integer index position for ApplyFunction.BaseFoldFunction. Evaluating an IdentifierExpr against these bindings will return the value(s) of the array at the current index for any lambda array identifiers, the value of the 'accumulator' for the lambda accumulator identifier, and fall through to the base Expr.ObjectBinding for all bindings provided by an outer scope.

Method Summary

Modifier and Type	Method	Description
ApplyFunction.IndexableFoldLambdaBinding	accumulateWithIndex(int index, Object accumulator)	Update the index and accumulator value
ExpressionType	getAccumulatorType()
int	getLength()	Total number of bindings in this binding

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

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

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

get

Method Detail

getAccumulatorType

ExpressionType getAccumulatorType()

getLength

int getLength()

Total number of bindings in this binding

accumulateWithIndex

ApplyFunction.IndexableFoldLambdaBinding accumulateWithIndex(int index,
                                                             Object accumulator)

Update the index and accumulator value