org.apache.druid.math.expr

Class Function.CastFunc

java.lang.Object

org.apache.druid.math.expr.Function.BivariateFunction

org.apache.druid.math.expr.Function.CastFunc

All Implemented Interfaces:

Function, NamedFunction

Enclosing interface:

Function

public static class Function.CastFunc
extends Function.BivariateFunction

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.druid.math.expr.Function

Function.Abs, Function.Acos, Function.ArrayAddElementFunction, Function.ArrayAppendFunction, Function.ArrayConcatFunction, Function.ArrayConstructorFunction, Function.ArrayContainsFunction, Function.ArrayLengthFunction, Function.ArrayOffsetFunction, Function.ArrayOffsetOfFunction, Function.ArrayOrdinalFunction, Function.ArrayOrdinalOfFunction, Function.ArrayOverlapFunction, Function.ArrayPrependFunction, Function.ArrayScalarFunction, Function.ArraySetAddAllFunction, Function.ArraySetAddFunction, Function.ArraysFunction, Function.ArraySliceFunction, Function.ArraysMergeFunction, Function.ArrayToMultiValueStringFunction, Function.ArrayToStringFunction, Function.Asin, Function.Atan, Function.Atan2, Function.BitwiseAnd, Function.BitwiseComplement, Function.BitwiseConvertDoubleToLongBits, Function.BitwiseConvertLongBitsToDouble, Function.BitwiseOr, Function.BitwiseShiftLeft, Function.BitwiseShiftRight, Function.BitwiseXor, Function.BivariateBitwiseMathFunction, Function.BivariateFunction, Function.BivariateMathFunction, Function.CaseSearchedFunc, Function.CaseSimpleFunc, Function.CastFunc, Function.Cbrt, Function.Ceil, Function.ConcatFunc, Function.ConditionFunc, Function.CopySign, Function.Cos, Function.Cosh, Function.Cot, Function.Div, Function.DoubleBivariateMathFunction, Function.DoubleUnivariateMathFunction, Function.Exp, Function.Expm1, Function.Floor, Function.GetExponent, Function.GreatestFunc, Function.HumanReadableBinaryByteFormatFunc, Function.HumanReadableDecimalByteFormatFunc, Function.HumanReadableDecimalFormatFunc, Function.Hypot, Function.IsNotNullFunc, Function.IsNullFunc, Function.LeastFunc, Function.LeftFunc, Function.Log, Function.Log10, Function.Log1p, Function.LowerFunc, Function.LpadFunc, Function.Max, Function.Min, Function.MultiValueStringToArrayFunction, Function.NextAfter, Function.NextUp, Function.NvlFunc, Function.ParseLong, Function.Pi, Function.Pow, Function.ReduceFunction, Function.Remainder, Function.RepeatFunc, Function.ReplaceFunc, Function.ReverseFunc, Function.RightFunc, Function.Rint, Function.Round, Function.RpadFunc, Function.SafeDivide, Function.Scalb, Function.Signum, Function.Sin, Function.Sinh, Function.SizeFormatFunc, Function.Sqrt, Function.StringFormatFunc, Function.StringLongFunction, Function.StringToArrayFunction, Function.StrlenFunc, Function.StrposFunc, Function.SubMonthFunc, Function.SubstringFunc, Function.Tan, Function.Tanh, Function.TimestampFromEpochFunc, Function.ToDegrees, Function.ToRadians, Function.Ulp, Function.UnivariateFunction, Function.UnivariateMathFunction, Function.UnixTimestampFunc, Function.UpperFunc

Constructor Summary

Constructors

Constructor and Description
CastFunc()

Method Summary

Modifier and Type	Method and Description
<T> ExprVectorProcessor<T>	asVectorProcessor(Expr.VectorInputBindingInspector inspector, List<Expr> args) Builds a 'vectorized' function expression processor, that can build vectorized processors for its input values using Expr.asVectorProcessor(org.apache.druid.math.expr.Expr.VectorInputBindingInspector), for use in vectorized query engines.
boolean	canVectorize(Expr.InputBindingInspector inspector, List<Expr> args) Check if a function can be 'vectorized', for a given set of Expr inputs.
protected ExprEval	eval(ExprEval x, ExprEval y)
Set<Expr>	getArrayInputs(List<Expr> args) Given a list of arguments to this Function, get the set of arguments that must evaluate to an array value
ExpressionType	getOutputType(Expr.InputBindingInspector inspector, List<Expr> args) Compute the output type of this function for a given set of argument expression inputs.
Set<Expr>	getScalarInputs(List<Expr> args) Given a list of arguments to this Function, get the set of arguments that must evaluate to a scalar value
String	name() Name of the function

Methods inherited from class org.apache.druid.math.expr.Function.BivariateFunction

apply, validateArguments

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.Function

hasArrayInputs, hasArrayOutput

Methods inherited from interface org.apache.druid.math.expr.NamedFunction

processingFailed, validationFailed, validationFailed, validationHelperCheckAnyOfArgumentCount, validationHelperCheckArgIsLiteral, validationHelperCheckArgumentCount, validationHelperCheckArgumentCount, validationHelperCheckArgumentRange, validationHelperCheckLambaArgumentCount, validationHelperCheckMinArgumentCount, validationHelperCheckMinArgumentCount

Constructor Detail

CastFunc

public CastFunc()

Method Detail

name

public String name()

Description copied from interface: NamedFunction

Name of the function

eval

protected ExprEval eval(ExprEval x,
                        ExprEval y)

Specified by:

eval in class Function.BivariateFunction

getScalarInputs

public Set<Expr> getScalarInputs(List<Expr> args)

Description copied from interface: Function

Given a list of arguments to this Function, get the set of arguments that must evaluate to a scalar value

getArrayInputs

public Set<Expr> getArrayInputs(List<Expr> args)

Description copied from interface: Function

Given a list of arguments to this Function, get the set of arguments that must evaluate to an array value

getOutputType

@Nullable
public ExpressionType getOutputType(Expr.InputBindingInspector inspector,
                                              List<Expr> args)

Description copied from interface: Function

Compute the output type of this function for a given set of argument expression inputs.

See Also:

Expr.getOutputType(org.apache.druid.math.expr.Expr.InputBindingInspector)

canVectorize

public boolean canVectorize(Expr.InputBindingInspector inspector,
                            List<Expr> args)

Description copied from interface: Function

Check if a function can be 'vectorized', for a given set of Expr inputs. If this method returns true, Function.asVectorProcessor(org.apache.druid.math.expr.Expr.VectorInputBindingInspector, java.util.List<org.apache.druid.math.expr.Expr>) is expected to produce a ExprVectorProcessor which can evaluate values in batches to use with vectorized query engines.

See Also:

Expr.canVectorize(Expr.InputBindingInspector), ApplyFunction.canVectorize(Expr.InputBindingInspector, Expr, List)

asVectorProcessor

public <T> ExprVectorProcessor<T> asVectorProcessor(Expr.VectorInputBindingInspector inspector,
                                                    List<Expr> args)

Description copied from interface: Function

Builds a 'vectorized' function expression processor, that can build vectorized processors for its input values using Expr.asVectorProcessor(org.apache.druid.math.expr.Expr.VectorInputBindingInspector), for use in vectorized query engines.

See Also:

Expr.asVectorProcessor(Expr.VectorInputBindingInspector), ApplyFunction.asVectorProcessor(Expr.VectorInputBindingInspector, Expr, List)