To maintain the integrity of the source data and to ensure that any data written from your application back to the COBOL source is accurate, you must provide a representational mapping between COBOL's SPACES and LOW-VALUES and the corresponding SQL column values.
Use the NULL_NUMERIC_WRITE variable to indicate how SQL NULLs in numeric data should be translated into COBOL data. For data returned to the COBOL files (WRITEs), indicate whether the NULLs in numeric data should be interpreted as SPACES, LOW-VALUES, or zero.
Valid values are:
NULL_NUMERIC_WRITE spaces NULL_NUMERIC_WRITE low-values NULL_NUMERIC_WRITE 0
By default, numeric data is interpreted as zero on output to the COBOL source.