我在SQL中有一个函数返回where子句结果，如此
CREATE FUNCTION dwd.GetSearchCriteria
(
@pValue NVARCHAR(50),
@pCriteriaOption NVARCHAR(3)
)
RETURNS varchar(30)
AS
BEGIN
declare
@WHERE varchar(2000)
IF(@pValue IS NOT NULL)
BEGIN
SET @WHERE = CASE WHEN @pCriteriaOption = 'ST' THEN ' like ''' + @pValue + '%'''
WHEN @pCriteriaOption = 'ET' THEN ' like ''' + '%' + @pValue + ''''
WHEN @pCriteriaOption = 'CT' THEN ' like ' + '''%' + @pValue + '%'''
ELSE ''
END
END
ELSE
BEGIN
SET @WHERE = '= NULL';
END
RETURN @WHERE
END
我有一个像这样调用此函数的查询
declare
@WHERE varchar(2000)
SET @WHERE=dwd.GetSearchCriteria ('A','ET')
SELECT FirstName FROM dwd.[User] WHERE FirstName + @WHERE
我的函数返回假设{like％A％}。我需要将它附加到名字。 它返回此错误
在上下文中指定的非布尔类型的表达式 条件是预期的，靠近'@WHERE'。
我喜欢这样的
ALTER PROCEDURE [dwd].[ADMIN_USER_DETAIL]
(
@pApplicationClientID bigint,
@pUserID bigint,
/* Optional Filters for Dynamic Search*/
@pFirstName nvarchar(50) = NULL,
@pLastName nvarchar(50) = NULL,
@pEmail nvarchar(255) = NULL,
@pLocation nchar(10) = NULL,
@pPhoneNumber nvarchar(50) = NULL,
@pPseudoName nvarchar(500) = NULL,
/*– Pagination Parameters */
@pPageNo INT = 1,
@pPageSize INT = 10,
/*– Sorting Parameters */
@pSortColumn nvarchar(50) = 'FirstName',
@pSortOrder nvarchar(4)='ASC',
@pTotalCount int output
)
AS
BEGIN
/*–Declaring Local Variables corresponding to parameters for modification */
DECLARE
@lFirstName nvarchar(50),
@lLastName nvarchar(50),
@lEmail nvarchar(255),
@lLocation nchar(10),
@lPhoneNumber nvarchar(50),
@lPseudoName nvarchar(500),
@lPageNbr INT,
@lPageSize INT,
@lSortCol NVARCHAR(50),
@lFirstRec INT,
@lLastRec INT,
@lTotalRows INT,
@TotalCount INT
/*Setting Local Variables*/
SET @lFirstName = LTRIM(RTRIM(@pFirstName))
SET @lLastName = LTRIM(RTRIM(@pLastName))
SET @lEmail = LTRIM(RTRIM(@pEmail))
SET @lLocation = LTRIM(RTRIM(@pLocation))
SET @lPhoneNumber = LTRIM(RTRIM(@pPhoneNumber))
SET @lPseudoName = LTRIM(RTRIM(@pPseudoName))
SET @lPageNbr = @pPageNo
SET @lPageSize = @pPageSize
SET @lSortCol = LTRIM(RTRIM(@pSortColumn))
SET @lFirstRec = ( @lPageNbr - 1 ) * @lPageSize
SET @lLastRec = ( @lPageNbr * @lPageSize + 1 )
SET @lTotalRows = @lFirstRec - @lLastRec + 1
; WITH User_Results
AS (
SELECT ROW_NUMBER() OVER (ORDER BY
CASE WHEN (@lSortCol = 'FirstName' AND @pSortOrder='ASC')
THEN U1.FirstName
END ASC,
CASE WHEN (@lSortCol = 'FirstName' AND @pSortOrder='DESC')
THEN U1.FirstName
END DESC,
CASE WHEN (@lSortCol = 'LastName' AND @pSortOrder='ASC')
THEN U1.LastName
END ASC,
CASE WHEN @lSortCol = 'LastName' AND @pSortOrder='DESC'
THEN U1.LastName
END DESC,
CASE WHEN @lSortCol = 'Email' AND @pSortOrder='ASC'
THEN U1.Email
END ASC,
CASE WHEN @lSortCol = 'Email' AND @pSortOrder='DESC'
THEN U1.Email
END DESC,
CASE WHEN @lSortCol = 'Location' AND @pSortOrder='ASC'
THEN U1.LocationID
END ASC,
CASE WHEN @lSortCol = 'Location' AND @pSortOrder='DESC'
THEN U1.LocationID
END DESC,
CASE WHEN @lSortCol = 'PhoneNumber' AND @pSortOrder='ASC'
THEN U1.PhoneNumber
END ASC,
CASE WHEN @lSortCol = 'PhoneNumber' AND @pSortOrder='DESC'
THEN U1.PhoneNumber
END DESC,
CASE WHEN @lSortCol = 'PseudoName' AND @pSortOrder='ASC'
THEN U1.PseudoName
END ASC,
CASE WHEN @lSortCol = 'PseudoName' AND @pSortOrder='DESC'
THEN U1.PseudoName
END DESC
) AS ROWNUM,
Count(*) over () AS TotalCount,
U1.ID,
U1.FirstName,
U1.LastName,
U1.Email,
DPD.Value as Location,
U1.PhoneNumber,
U2.FirstName+' '+U2.LastName as ReportTo,
U1.PseudoName,
U1.IsActive,
US.ID AS SId,
US.SkillID AS SkillId,
UR.ID AS RId,
UR.RoleID AS RoleId,
U1.Created,
U1.Deleted
FROM dwd.[User] U1 with (nolock)
INNER JOIN dwd.[User] U2 with (nolock) ON U2.ID=U1.ReportTo
INNER JOIN dwd.[DomainParameterDetail] DPD with (nolock) ON DPD.ID=U1.LocationID
INNER JOIN dwd.[UserSkill] US WITH(NOLOCK) ON U1.ID = US.UserID
INNER JOIN dwd.[UserRole] UR WITH(NOLOCK) ON U1.ID = UR.UserID
WHERE
(@lFirstName IS NULL OR U1.FirstName = @lFirstName)
AND(@lLastName IS NULL OR U1.LastName LIKE '%' + @lLastName + '%')
AND(@lEmail IS NULL OR U1.Email LIKE '%' + @lEmail + '%')
AND (@lLocation IS NULL OR U1.LocationID LIKE '%' + @lLocation + '%')
AND (@lPhoneNumber IS NULL OR U1.PhoneNumber = @lPhoneNumber)
AND (@lPseudoName IS NULL OR U1.PseudoName LIKE '%' +@lPseudoName+ '%')
AND U1.IsActive=1 AND U1.Deleted=0 AND U1.ApplicationClientID=@pApplicationClientID
AND U1.ID<>1
)
SELECT
TotalCount,
ROWNUM,
ID,
FirstName,
LastName,
Email,
Location,
PhoneNumber,
ReportTo,
PseudoName,
IsActive,
S
Id,
SkillId,
RId,
RoleId,
Created,
Deleted
FROM User_Results AS USER_GET_RESULT
WHERE
ROWNUM > @lFirstRec
AND ROWNUM < @lLastRec
ORDER BY ROWNUM ASC
Select @TotalCount = Count(*) from dwd.[User]
WHERE IsActive=1 AND Deleted=0 AND ID<>1
Set @pTotalCount = @TotalCount
END
所以我必须在SP的where子句中得到这个。
答案 0 :(得分：3)
评论时间有点长。
您只能使用动态SQL执行所需操作。但是，这似乎完全没有必要，因为所有的比较都使用LIKE。因此，最好将函数编写为：
CREATE FUNCTION dwd.GetSearchCriteria (
@pValue NVARCHAR(50),
@pCriteriaOption NVARCHAR(3)
)
RETURNS varchar(2000)
AS
BEGIN
declare @LIKEPATTERN varchar(2000) ;
SET @LIKEPATTERN = (CASE WHEN @PValue IS NULL THEN ''''''
WHEN @pCriteriaOption = 'ST' THEN '''' + @pValue + '%'''
WHEN @pCriteriaOption = 'ET' THEN '''' + '%' + @pValue + ''''
WHEN @pCriteriaOption = 'CT' THEN '''%' + @pValue + '%'''
ELSE ''''''
END)
RETURN @LIKEPATTERN
END ;
注意：使用IF和CASE是多余的。逻辑可以组合成单个表达式。我还认为返回类型应该与返回的变量的类型相匹配。
然后您可以将呼叫表达为：
DECLARE @LIKEPATTERN varchar(2000);
SET @LIKEPATTERN = dwd.GetSearchCriteria('A','ET');
SELECT FirstName FROM dwd.[User] WHERE FirstName LIKE @LIKEPATTERN;