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The mi_fp_retscale() accessor function obtains scale of a return value of a user-defined function from its associated MI_FPARAM structure.
The mi_fp_retscale() function obtains the scale of the routine return value at position ret_pos from the MI_FPARAM structure that fparam_ptr references. The scale is an attribute of the return-value data type. The meaning of the scale depends on the associated data type, as the following table shows.
If you call mi_fp_retscale() on some other data type, the function returns zero (0).
The MI_FPARAM structure stores information about the scale of function return values in the zero-based return-scale array. To obtain information about the nth return value, use a ret_pos value of n-1. For example, the following call to mi_fp_retscale() obtains the scale for the first return value of the my_func() user-defined function, with which fparam1 is associated:
Important: C user-defined functions always have only one return value.
Return Values
Related Topics
See the descriptions of the following functions: mi_fp_argscale(), mi_fp_retlen(), mi_fp_retprec(), mi_fp_rettype(), mi_fp_returnisnull(), mi_fp_setargscale(), and mi_fp_setretscale().