SAP FLOATING POINT FUNCTIONS documentation, setup help and example usage

ARTICLE

acos , sin , tanh , exp , log , sqrt
- Floating Point Functions
The following table shows the floating point functions that expect a floating point number as an unnamed argument. Floating point functions are overloaded so that the return code can have the type decfloat34 or f . Decimal floating point numbers are still only possible as arguments of exp , log , log10 , and sqrt .

Syntax
... func( arg ) ...

Effect
The argument of a floating point function must be a single data object outside an arithmetic expression and can be an arithmetic expression itself within an arithmetic expression.
Effect of the floating point functions:
Function func Meaning Definition Range
ABAP_KEY acos arccosine[-1,1], no decfloat34
ABAP_KEY asin arcsine[-1,1], no decfloat34
ABAP_KEY atan arctangent-, no decfloat34
ABAP_KEY cos cosine -, no decfloat34
ABAP_KEY sin sine -, no decfloat34
ABAP_KEY tan tangent -, no decfloat34
ABAP_KEY cosh hyperbolic cosine -, no decfloat34
ABAP_KEY sinh hyperbolic sine -, no decfloat34
ABAP_KEY tanh hyperbolic tangent -, no decfloat34
ABAP_KEY exp Exponential function for base e[-709, 709] for type f and [-14144, 14149] for type decfloat34
ABAP_KEY log Natural logarithm 0
ABAP_KEY log10 Logarithm to base 10 0
ABAP_KEY sqrt Square root = 0
Functions that specify "no decfloat34 " cannot currently have the calculation type decfloat34 . If one of these functions is specified in an expression with this calculation type, a syntax error occurs or the exception
CX_SY_UNSUPPORTED_FUNCTION is raised.
The following applies to the
floating point arithmetic in which a floating point function is calculated, and to the data type of the return code:

If the argument has the type decfloat16 or decfloat34 , a floating point function is calculated in decimal floating point arithmetic and the return code has the type decfloat34 .

If a floating point function is used in an arithmetic expression whose calculation type is decfloat34

, or that contains a numeric expression of type decfloat34 as an argument, it also calculates a return code with the type decfloat34 and the argument is first converted to the data type decfloat34 , if necessary.

In all other cases, floating point functions use binary floating point arithmetic to calculate a return code with type f and the argument is first converted to the data type f , if necessary.

Functions with a definition range require the value of arg to be within the specified limits. Arguments within the definition ranges are guaranteed to be error-free for the exponential function exp , since the results are then within the value ranges for binary or decimal floating point numbers in accordance with IEEE-754 . For arguments less than -709, the result for binary floating point numbers is (depending on the platform) a subnormal number, 0, or a handleable exception of the class
CX_SY_ARITHMETIC_OVERFLOW is raised from a specific value.
The trigonometric functions sin , cos , and tan are defined for any arguments but the results become imprecise if the argument is greater than approximately 100,000,000.

Notes

The atan function is undefined for odd-number multiples of pi/2, but the definition range of atan is nevertheless restricted since an argument of this function can never contain the precise value of pi/2.

The functions described here are some of the functions that can be used in the obsolete extended functional operand positions , even if their argument is a single data object.

Runtime Exceptions

Catchable Exceptions

CX_SY_ARG_OUT_OF_DOMAIN

Reason for error: Invalid call of acos

Runtime error: COMPUTE_ACOS_DOMAIN

Reason for error: Invalid call of asin

Runtime error: COMPUTE_ASIN_DOMAIN

Reason for error: Unzul�ssiger Aufruf von atan

Laufzeitfehler: COMPUTE_ATAN_DOMAIN

Reason for error: Unzul�ssiger Aufruf von cosh

Laufzeitfehler: COMPUTE_COSH_DOMAIN

Reason for error: Invalid call of cos

Runtime error: COMPUTE_COS_DOMAIN

Reason for error: Unzul�ssiger Aufruf von exp

Laufzeitfehler: COMPUTE_EXP_DOMAIN

Reason for error: Invalid call of log10

Runtime error: COMPUTE_LOG10_ERROR

Reason for error: Invalid call of log

Runtime error: COMPUTE_LOG_ERROR

Reason for error: Unzul�ssiger Aufruf von sinh

Runtime error: COMPUTE_SINH_DOMAIN

Reason for error: Invalid call of sin

Runtime error: COMPUTE_SIN_DOMAIN

Reason for error: Invalid call of sqrt

Runtime error: COMPUTE_SQRT_DOMAIN

Reason for error: Unzul�ssiger Aufruf von tanh

Runtime error: COMPUTE_TANH_DOMAIN

Reason for error: Invalid call of tan

Runtime error: COMPUTE_TAN_DOMAIN

Documentation extract taken from SAP system, � Copyright SAP AG. All rights reserved

FLOATING_POINT_CLASS

FLOATING_POINT_FUNCTION_GLOSRY

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