发生了无效的浮点运算.SQL Server 2008

Question

我有这个代码的奇怪问题:如果我运行它如下所示我得到错误:

发生了无效的浮点运算.

但是,如果我将参数更改@Longitude为-98.508730 (通知仅更改了最后一位数),代码工作正常.

该代码应该列出@MilesRadius一些LatLng点周围的属性.
@Latitude和@Longitude参数与表Address中的经度和纬度字段的类型相同.

我能在这做什么？谢谢.

DECLARE @Latitude decimal (10,6);
DECLARE @Longitude decimal (10,6);
DECLARE @MilesRadius int;
SET @Latitude = 29.607654
SET @Longitude = -98.508731
SET @MilesRadius  = 5

SELECT     ADR.LineOne as address, 
           ADR.City as city,           
           ADR.Latitude as latitude,
           ADR.Longitude as longitude, 
           ((3959 * acos(cos(radians(@Latitude)) * cos(radians(ADR.Latitude)) * cos(radians(ADR.Longitude) - radians(@Longitude)) + sin(radians(@Latitude)) * sin(radians(ADR.Latitude))))) as distance
FROM       Shared.Address ADR
WHERE      ADR.Latitude IS NOT NULL AND 
           ADR.Longitude IS NOT NULL AND 
           (3959 * acos(cos(radians(@Latitude)) * cos(radians(ADR.Latitude)) * cos(radians(ADR.Longitude) - radians(@Longitude)) + sin(radians(@Latitude)) * sin(radians(ADR.Latitude)))) < @MilesRadius                       
ORDER BY distance

Answer 1

您正在使用的唯一函数返回域错误是ACOS当输入不在范围内时发生,-1 to +1因此您可以摆弄这种情况(我假设中间表达式是1.000000000001由于舍入错误)

SELECT     ADR.LineOne as address, 
           ADR.City as city,           
           ADR.Latitude as latitude,
           ADR.Longitude as longitude, 
           distance
FROM       Shared.Address ADR
CROSS APPLY (SELECT cos(radians(@Latitude)) * cos(radians(ADR.Latitude)) * cos(radians(ADR.Longitude) - radians(@Longitude)) + sin(radians(@Latitude)) * sin(radians(ADR.Latitude))) T(ACosInput)
CROSS APPLY (SELECT ((3959 * acos(CASE WHEN ABS(ACosInput) > 1 THEN SIGN(ACosInput)*1 ELSE ACosInput END)))) T2(distance)
WHERE      ADR.Latitude IS NOT NULL AND 
           ADR.Longitude IS NOT NULL AND 
           distance < @MilesRadius                       
ORDER BY distance