Package org.apache.druid.math.expr

Class Function.IsNotDistinctFromFunc

java.lang.Object

org.apache.druid.math.expr.Function.IsNotDistinctFromFunc

All Implemented Interfaces:

Function, NamedFunction

Direct Known Subclasses:

Function.IsDistinctFromFunc

Enclosing interface:

Function

public static class Function.IsNotDistinctFromFunc
extends Object
implements Function

SQL function "x IS NOT DISTINCT FROM y". Very similar to "x = y", i.e. BinEqExpr, except this function never returns null, and this function considers NULL as a value, so NULL itself is not-distinct-from NULL. For example: `x == null` returns `null` in SQL-compatible null handling mode, but `notdistinctfrom(x, null)` is true if `x` is null.

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.CoalesceFunc, 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.MultiValueStringHarmonizeNullsFunction, 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.ScalarInArrayFunction, 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	Description
IsNotDistinctFromFunc()

Method Summary

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 for IdentifierExpr.
ExpressionType	getOutputType(Expr.InputBindingInspector inspector, List<Expr> args)	Compute the output type of this function for a given set of argument expression inputs.
String	name()	Name of the function
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

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

asSingleThreaded, asVectorProcessor, canVectorize, getArrayInputs, getScalarInputs, 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

IsNotDistinctFromFunc

public IsNotDistinctFromFunc()

Method Detail

name

public String name()

Description copied from interface: NamedFunction

Name of the function

Specified by:

name in interface NamedFunction

apply

public ExprEval apply(List<Expr> args,
                      Expr.ObjectBinding bindings)

Description copied from interface: Function

Evaluate the function, given a list of arguments and a set of bindings to provide values for IdentifierExpr.

Specified by:

apply in interface Function

validateArguments

public void validateArguments(List<Expr> args)

Description copied from interface: Function

Validate function arguments. This method is called whenever a FunctionExpr is created, and should validate everything that is feasible up front. Note that input type information is typically unavailable at the time Expr are parsed, and so this method is incapable of performing complete validation.

Specified by:

validateArguments in interface Function

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 interface Function

See Also:

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