Question

我是一个enzee新手，需要帮助将我们编写的MSSQL函数转换为新的Netezza设备。我不懂C ++，所以任何帮助都会受到赞赏。这是sql代码：

ALTER FUNCTION [dbo].[PMT] 
(
      -- Add the parameters for the function here
      @Term float,
      @Rate float,
      @LoanSize float
)
RETURNS float
AS
BEGIN
      -- Declare the return variable here
      DECLARE @Result float
      DECLARE @NewRate float

      set @NewRate = @Rate/1200
      -- Add the T-SQL statements to compute the return value here
      SELECT @Result =
      case when @NewRate = 0 then 
            @LoanSize/@Term 
      else
            @LoanSize/((1-(1/POWER(1+@NewRate,@Term)))/(@NewRate))
      end

      -- Return the result of the function
      RETURN @Result

END

Answer 1

无法在UDF中完成查询。传递给UDF的所有内容都在每一行上执行。如果UDF是确定性的，则每行将返回一个答案。我没有看到任何需要UDF的内容

select somenum as newrate, somename as term, somenum as loansize,
case 
when NewRate = 0 
     then LoanSize/Term 
     else LoanSize/((1-(1/POWER(1+NewRate,Term)))/(NewRate))
end as mynewcol

从TSQL创建Netezza UDX

1 个答案: