Informix DataBlade API Programmer's Manual DataBlade API Function Descriptions

The mi_fp_nrets() accessor function obtains the number of return values for the UDR from its associated MI_FPARAM structure.

mi_integer mi_fp_nrets(fparam_ptr)

MI_FPARAM *fparam_ptr;

fparam_ptr

is a pointer to the associated MI_FPARAM structure.

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

You can use the mi_fp_nrets() function with the DataBlade API functions that obtain information about each return value of the UDR (such as mi_fp_rettype() and mi_fp_returnisnull()). For example, the following call to mi_fp_nrets() obtains the number of return values from the MI_FPARAM structure that fparam1 identifies and uses the value in a loop to obtain the length of each return value:

ret_count = mi_fp_nrets(fparam1);
for (i = 0; i < ret_count; i++)
	{
	ret_len[i] = mi_fp_retlen(fparam1, i);

	...



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

See the descriptions of the following functions: mi_fp_nargs(), mi_fp_retlen(), mi_fp_retprec(), mi_fp_retscale(), mi_fp_rettype(), mi_fp_returnisnull(), and mi_fp_setnrets().