Re: External functions in IUS

I haven't had a chance to do much server function programming with IUS yet, but I understand that the rules for passing parameters and return values are the same as in Illustra (which I have used.) For 4 byte floating point numbers and anything longer (including doubles) you must pass the input parameters by reference. Also your return value must be pointer to double (in this case), and you must allocate the space for this return value (using mi_alloc) in your function. Hope this helps,... Mike Jack G. Clayton wrote: > > I'm trying to do something very simple and yet... > > In IUS 9.12.UC2 I am creating a function thusly: > > create function total (val1 integer, num1 float) > returning float;> external name '/dir/IUSfuncs.so(IUSfuncs_total)' > language c > end function; > > My c function is pretty boneheaded: > > double IUSfuncs_total (long val1, double num1) > { > return (val1 * num1); > } > > After compiling as a shared object, I try to run the following statement > in dbaccess: > > select total(quantity, price) from table;