SAP CONVERSION TYPE DECFLOAT documentation, setup help and example usage

ARTICLE

Source Field Type decfloat16 , decfloat34
If the source field does not contain a valid decimal floating point number, the treatable exception CX_SY_CONVERSION_NO_NUMBER is raised, except in the case of the assignment to another decimal floating point number. In ABAP, invalid decimal floating point numbers also include the special values "+Infinity" , "-Infinity" ,
"NaN" , and "sNaN" , which represent infinity or invalid numbers and are designated in the IEEE-754-2008 standard.

Numeric Target Fields
Target Conversion
i ,
int8 , ( b , s )The value of the decimal floating point number is rounded up to the nearest integer. If this number is within the value range for the data type i ,
int8 , ( b , s ), it is converted to the internal representation of the corresponding integer number. If the number is not within this range, the treatable exception CX_SY_CONVERSION_OVERFLOW occurs.
p The value of the decimal floating point number is rounded to the number of decimal places in the target field. If this number is within the value range for the data type of the target field, it is converted to the internal representation of a packed number. If the number is not within this range, the treatable exception CX_SY_CONVERSION_OVERFLOW occurs.
decfloat16 , decfloat34 If an assignment is made to the same data type, the content is passed unconverted. For an assignment from decfloat34 to decfloat16 the mantissa is shortened from 34 to 16 places, and commercially rounded if necessary. If the mantissa of the target field is long enough, the
scaling is preserved. If the value range
of decfloat16 is exceeded, the treatable exception
CX_SY_CONVERSION_OVERFLOW is raised.
f fThe value of the decimal floating point number is applied in the value of a binary floating point number. If the decimal number cannot be represented as a binary floating point number, the nearest value is used. If the value is outside the value range for floating point numbers, the handleable exception CX_SY_CONVERSION_OVERFLOW
is raised.

Character-Like Target Fields
Target Conversion
c The content of the source field is first converted into a mathematical or scientific notation , as described for the data type string . The result of this conversion is then copied, right-justified into the target field. If the target field is longer than the text string, the space to the left is filled with blank spaces. If the target field is shorter than the text string, mathematical notation is converted into scientific notation and if necessary the mantissa is commercially rounded. If the length is not sufficient for at least one digit of the mantissa, the treatable exception CX_SY_CONVERSION_OVERFLOW is raised.
string If the exponent of the decimal floating point number is less than 0 and the absolute value of the number is bigger than 1E-6, the floating point number is formatted as follows into mathematical notation without spaces: The numerical sequence is made up of the mantissa of the decimal floating point number without leading zeros. If the exponent of the decimal floating point number is smaller than 0, a decimal point is inserted at the corresponding position. If the exponent of the decimal floating point number is bigger than 0 or the absolute value of the number is smaller than 1E-6, the floating point number is formatted as follows into scientific notation : The mantissa is made up of the mantissa of the decimal floating point number without leading zeros. If the mantissa contains more than one decimal place, a decimal point is inserted after the first place. The exponent is always displayed with algebraic sign and without leading zeros. In both depictions the algebraic sign is displayed for negative values but not for positive. Both depictions are also used if the value of the decimal floating point number is zero. The maximum length of the target field is 24 for decfloat16 and 42 for decfloat34 .
n The value of the decimal floating point number is rounded up to the nearest integer. The absolute value is transferred as a character string right-aligned to the target field. If the target field is longer than the character string, the field is filled with zeros from the left. If it is too short, the treatable exception
CX_SY_CONVERSION_OVERFLOW is raised.
d The content of the source field is first converted to the data type i (see above), and then to the type d (see the conversion table for source field type
i ,
int8 , ( b , s ) ).
t The content of the source field is first converted to the data type i (see above), and then to the type t (see the conversion table for source field type
i ,
int8 , ( b , s ) ).

Notes

The conversion rule for floating point numbers to text strings is as follows: a text string filled by the assignment of a decimal floating point number produces the same internal representation as in the original decimal floating point number (preserves the scaling ).

The formatting options STYLE for the statement WRITE ... TO and STYLE for embedded expressions in string templates of string expressions provide additional formats for the assignment of decimal floating point numbers to text strings.

Examples
The following table shows how decimal floating point numbers are converted to text strings:
Floating point number Text string
123E+0123
123E+11.23E+3
2E+1 2E+1
1230E-2 12.30
5E-6 0.000005
50E-7 0.0000050
5E-7 5E-7
50E-8 5.0E-7
-0E+0 -0
0E-100 0E-100

Byte-Like Target Fields
Target Conversion
x The content of the source field is first converted to the data type i (see above), and then to the type x (see the conversion table for source field type
i ,
int8 , ( b , s ) ).
xstring The content of the source field is first converted to the data type i (see above), and then to the type x (see the conversion table for source field type i ,
int8 , ( b , s ) ).

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