Package org.apache.druid.math.expr
Class Function.ReduceFunction
- java.lang.Object
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- org.apache.druid.math.expr.Function.ReduceFunction
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- All Implemented Interfaces:
Function
,NamedFunction
- Direct Known Subclasses:
Function.GreatestFunc
,Function.LeastFunc
- Enclosing interface:
- Function
public abstract static class Function.ReduceFunction extends Object implements Function
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Nested Class Summary
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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.IsDistinctFromFunc, Function.IsFalseFunc, Function.IsNotDistinctFromFunc, Function.IsNotFalseFunc, Function.IsNotNullFunc, Function.IsNotTrueFunc, Function.IsNullFunc, Function.IsTrueFunc, 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
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description ExprEval
apply(List<Expr> args, Expr.ObjectBinding bindings)
Evaluate the function, given a list of arguments and a set of bindings to provide values forIdentifierExpr
.ExpressionType
getOutputType(Expr.InputBindingInspector inspector, List<Expr> args)
Compute the output type of this function for a given set of argument expression inputs.void
validateArguments(List<Expr> args)
Validate function arguments.-
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.apache.druid.math.expr.Function
asVectorProcessor, canVectorize, getArrayInputs, getScalarInputs, hasArrayInputs, hasArrayOutput
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Methods inherited from interface org.apache.druid.math.expr.NamedFunction
name, processingFailed, validationFailed, validationFailed, validationHelperCheckAnyOfArgumentCount, validationHelperCheckArgIsLiteral, validationHelperCheckArgumentCount, validationHelperCheckArgumentCount, validationHelperCheckArgumentRange, validationHelperCheckLambaArgumentCount, validationHelperCheckMinArgumentCount, validationHelperCheckMinArgumentCount
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Method Detail
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validateArguments
public void validateArguments(List<Expr> args)
Description copied from interface:Function
Validate function arguments. This method is called whenever aFunctionExpr
is created, and should validate everything that is feasible up front. Note that input type information is typically unavailable at the timeExpr
are parsed, and so this method is incapable of performing complete validation.- Specified by:
validateArguments
in interfaceFunction
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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.- Specified by:
getOutputType
in interfaceFunction
- See Also:
Expr.getOutputType(org.apache.druid.math.expr.Expr.InputBindingInspector)
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