为什么在sql server中显示将数据类型varchar转换为int？

Question

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我在做2008年的SQL Server中的存储过程搜索 目的，下面的代码代表我的存储过程，在执行 存储过程像转换失败VARCHAR数据提示错误 类型为int

**

ALTER PROCEDURE [dbo].[SUMMARY_DETAILS_PROJECT_SEARCH_MAP] 

@PROJECT_CAT     INT=NULL, 
@PROJECT_TYPE     INT=NULL, 
@ADDRESS      VARCHAR(150)=NULL, 
@MIN_PRICE      INT=NULL, 
@MAX_PRICE      INT=NULL, 
@BEDROOM      VARCHAR(150)=NULL 
AS 

CREATE TABLE #TEMP_MAP 
(
SN      INT IDENTITY, 
PROJECT_ID    INT, 
PROJECT_NAME   VARCHAR(100), 
LAT     VARCHAR(50), 
LONG     VARCHAR(50), 
PROJECT_LOC   VARCHAR(150), 
MIN_PRICE    VARCHAR(100), 
MAX_PRICE    VARCHAR(100), 
PROJECT_IMAGE   VARCHAR(250) 
) 
DECLARE @SQL NVARCHAR(MAX),@PARAMETER_LIST NVARCHAR(MAX) 
DECLARE @COUNT_ZONE  INT 
DECLARE @COUNT_CITY  INT 

SELECT @COUNT_ZONE= (SELECT COUNT(*) FROM ZONE_MASTER WHERE ZONE_NAME LIKE @ADDRESS + '%') 
SELECT @SQL = ('SELECT PROJECT_ID FROM PROJECTS WHERE STATUS=1') 
IF(@PROJECT_CAT !=0) 
SELECT @SQL = @SQL+' AND PROJECT_CAT_ID=@XP_PROJECT_CAT' 
IF(@PROJECT_TYPE !=0) 
SELECT @SQL = @SQL+' AND PROJECT_TYPE_ID=@XP_PROJECT_TYPE' 
IF(@COUNT_ZONE !=0) 
SELECT @SQL = @SQL+' AND ZONE_ID IN (SELECT ZONE_ID FROM ZONE_MASTER WHERE ZONE_NAME LIKE '''+@ADDRESS+''' + ''%'')' 
ELSE 
SELECT @SQL = @SQL+' AND BLOCK_ID IN (SELECT BLOCK_ID FROM BLOCK_MASTER WHERE BLOCK_NAME LIKE '''+@ADDRESS+''' + ''%'')' 
IF(@MIN_PRICE !=0) 
SELECT @SQL = @SQL+' AND MIN_ID >=@XP_MIN_PRICE' 
IF(@MAX_PRICE !=0) 
SELECT @SQL = @SQL+' AND MAX_ID <=@XP_MAX_PRICE' 
IF(@BEDROOM !='') 
SELECT @SQL = @SQL+' AND BEDROOM=@XP_BEDROOM' 

SELECT @SQL = @SQL + ' ORDER BY PROJECT_ENTRY_DATE DESC ' 
SELECT @PARAMETER_LIST = '@XP_PROJECT_CAT INT,@XP_PROJECT_TYPE INT,@XP_MIN_PRICE INT,@XP_MAX_PRICE INT,@XP_BEDROOM VARCHAR(100)' 


INSERT INTO #TEMP_MAP (PROJECT_ID) 
EXEC SP_EXECUTESQL @SQL,@PARAMETER_LIST,'@XP_PROJECT_CAT','@XP_PROJECT_TYPE','@XP_MIN_PRICE','@XP_MAX_PRICE','@XP_BEDROOM' 

PRINT @SQL 

UPDATE #TEMP_MAP SET 
PROJECT_NAME  = P.PROJECT_NAME, 
LAT     = P.PROJECT_LAT, 
LONG    = P.PROJECT_LONG, 
PROJECT_LOC   = P.PROJECT_LOC, 
MIN_PRICE   = P.MAX_PRICE, 
MAX_PRICE   = P.MIN_PRICE, 
PROJECT_IMAGE  = './UploadImage/Upload_Project/' + P.PROJECT_NAME +'/' + 'Google' + '/' + [IMG1] 
FROM Projects P WHERE P.PROJECT_ID=#TEMP_MAP.PROJECT_ID 

SELECT * FROM #TEMP_MAP 

DROP TABLE #TEMP_MAP 

Answer 1

这是因为你把你身边的是值单引号传递给sp_executesql，e.g：

EXEC SP_EXECUTESQL @SQL,@PARAMETER_LIST,'@XP_PROJECT_CAT' 

在这里，你是不及格的@XP_PROJECT_CAT整数值，但你传递字符串'@XP_PROJECT_CAT'和程序期待一个int。

顺便说一下，我不确定为什么选择参数化地址以外的所有东西？当然，这也是有意义的 - 例如，

IF(@COUNT_ZONE !=0) 
    SELECT @SQL = @SQL+' AND ZONE_ID IN (SELECT ZONE_ID 
             FROM ZONE_MASTER 
             WHERE ZONE_NAME LIKE @ADDRESS + ''%'')' 
ELSE 
    SELECT @SQL = @SQL+' AND BLOCK_ID IN (SELECT BLOCK_ID 
             FROM BLOCK_MASTER 
             WHERE BLOCK_NAME LIKE @ADDRESS + ''%'')' 

然后作为参数添加到@Addresssp_executesql