public static SqlNumber Subtract(SqlNumber a, SqlNumber b, int precision)
{
if (SqlNumber.IsNumber(a))
{
if (SqlNumber.IsNumber(b))
{
var context = new MathContext(precision);
var result = BigMath.Subtract(a.innerValue, b.innerValue, context);
return(new SqlNumber(SqlNumber.NumericState.None, result));
}
return(new SqlNumber(b.InverseState(), null));
}
return(a);
}
