Informix DataBlade API Programmer's Manual DataBlade API Function Descriptions

The mi_fp_setretprec() accessor function sets the precision of a return value of a user-defined function in its associated MI_FPARAM structure.

void mi_fp_setretprec(fparam_ptr, ret_pos, ret_prec)

MI_FPARAM *fparam_ptr;

mi_integer ret_pos;

mi_integer ret_prec;

fparam_ptr	is a pointer to the associated MI_FPARAM structure.
ret_pos	is the index position into the return-precision array for the return value whose precision you want to set. For C user-defined functions, the only valid value is 0.
ret_prec	is the precision, in number of digits, to set for the ret_pos+1 return value.

Valid in Client LIBMI Application?	Valid in User-Defined Routine?
Yes	Yes

The mi_fp_setretprec() function sets the precision of the function return value at position ret_pos in the MI_FPARAM structure that fparam_ptr references.

The precision is an attribute of the data type that represents the total number of digits the routine return value can hold, as follows.

The MI_FPARAM structure stores information about the precision of function return values in the zero-based return-precision array. To set information for the nth return value, use a ret_pos value of n-1.

For example, the following call to mi_fp_setretprec() sets the precision of 10 for the first return value of the my_func() UDR, with which fparam1 is associated:

mi_integer my_func(...., fparam1)
	

	MI_FPARAM *fparam1;
{
	

	mi_fp_setretprec(fparam1, 0, 10);


Important: C user-defined functions always have only one return value. 

None.

See the descriptions of the following functions: mi_fp_argprec(), mi_fp_setargprec(), mi_fp_setretlen(), mi_fp_setretscale(), mi_fp_setrettype(), and mi_fp_setreturnisnull().