将varchar转换为数值数据类型

Question

I have a stored procedure spGetMetricValues in a sql file. To execute it I have another file has the following:

ALTER PROCEDURE [dbo].[spGetMetricValues]

  EXECQSG.dbo.EXCEL_FUNC
    @asofdate date,
    @startdate date,
    @coupon_type varchar(25),
    @security_term varchar(25),
    @metric_type varchar(25),
    @whose_holding varchar(25),
    @accretion_type varchar(25),
    @decomp_method varchar(25)

  DECLARE @output decimal(28,10)
  SELECT @output = @query  --@query is defined in the SP as varchar(1000)
  RETURN (ISNULL(@output,0))
END

When I execute, I get an error

Arithmetic Overflow Error Converting varchar to data numeric

Can someone please tell what should I do to resolve the problem?

Answer 1

返回将只接受整数dataType

RETURN [int]