Asp.net 当我传递@ip=''时，存储过程在if语句中花费了太多的时间，并花费了0秒的时间将某些值传递给@ip

我已经低于SP，它花费了太多的时间，最后停止与

EXEC MemberListing 1,20,'','','RegDate','Desc',0

如果将任何值传递给@IP参数，则它将起作用。不知道为什么

Create PROCEDURE MemberListing
    @PageNum as Int,
    @PerPageResult as Int,
    @Username as nvarchar(50),
    @IP as varchar(50),
    @sortColumn as Varchar(50),
    @sortOrder as Varchar(4),
    @TotalCount as int OUTPUT
AS
BEGIN   
    declare @Temp Table(RowNum int, id bigint, Username nvarchar(50), Email nvarchar(50), RegDate DateTime, Country varchar(25),
                            LastLogin DateTime, IsGoldMember varchar(1))
    declare @sort varchar(50)
    if @IP = ''
        BEGIN
            print 'if'
            SET FMTONLY OFF;
            Insert into @Temp
            Select ROW_NUMBER() over (order by  
            case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'id' then id end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'Username' then Username end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'Email' then Email end ASC
        ,   case when @sortOrder <> 'ASC' then cast(null as datetime) when @sortColumn = 'RegDate' then RegDate end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'Country' then Country end ASC
        ,   case when @sortOrder <> 'ASC' then cast(null as datetime) when @sortColumn = 'LastLogin' then LastLogin end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'IsGoldMember' then IsGoldMember end ASC

        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'id' then id end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'Username' then Username end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'Email' then Email end DESC
        ,   case when @sortOrder <> 'DESC' then cast(null as datetime) when @sortColumn = 'RegDate' then RegDate end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'Country' then Country end DESC
        ,   case when @sortOrder <> 'DESC' then cast(null as datetime) when @sortColumn = 'LastLogin' then LastLogin end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'IsGoldMember' then IsGoldMember end DESC
            ) As RowNum, * From (   
            SELECT 
                m.id,m.login as Username,m.email as Email,m.registrationdate as RegDate,c.name as Country,m.lastlogindate as LastLogin,
                CASE WHEN (r.description='goldmember' or r.description='goldmember_forever') then 1 end As IsGoldMember 
            from member m 
            join country c on m.country_id = c.id
            join user_role ur on m.id=ur.member_id
            join role r on r.id=ur.role_id
            left join lastip l on m.id=l.user_id
            where r.description <> 'administrator' and m.login like @Username+'%'
            ) as aab
            Select * from @Temp Where RowNum> @PageNum-1 and RowNum<@PerPageResult+@PageNum
            order by 
            case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'id' then id end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'Username' then Username end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'Email' then Email end ASC
        ,   case when @sortOrder <> 'ASC' then cast(null as datetime) when @sortColumn = 'RegDate' then RegDate end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'Country' then Country end ASC
        ,   case when @sortOrder <> 'ASC' then cast(null as datetime) when @sortColumn = 'LastLogin' then LastLogin end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'IsGoldMember' then IsGoldMember end ASC

        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'id' then id end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'Username' then Username end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'Email' then Email end DESC
        ,   case when @sortOrder <> 'DESC' then cast(null as datetime) when @sortColumn = 'RegDate' then RegDate end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'Country' then Country end DESC
        ,   case when @sortOrder <> 'DESC' then cast(null as datetime) when @sortColumn = 'LastLogin' then LastLogin end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'IsGoldMember' then IsGoldMember end DESC
        END
    ELSE
        BEGIN
            print 'else'
            SET FMTONLY OFF;
            Insert into @Temp
            Select ROW_NUMBER() over (order by  
            case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'id' then id end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'Username' then Username end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'Email' then Email end ASC
        ,   case when @sortOrder <> 'ASC' then cast(null as datetime) when @sortColumn = 'RegDate' then RegDate end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'Country' then Country end ASC
        ,   case when @sortOrder <> 'ASC' then cast(null as datetime) when @sortColumn = 'LastLogin' then LastLogin end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'IsGoldMember' then IsGoldMember end ASC

        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'id' then id end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'Username' then Username end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'Email' then Email end DESC
        ,   case when @sortOrder <> 'DESC' then cast(null as datetime) when @sortColumn = 'RegDate' then RegDate end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'Country' then Country end DESC
        ,   case when @sortOrder <> 'DESC' then cast(null as datetime) when @sortColumn = 'LastLogin' then LastLogin end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'IsGoldMember' then IsGoldMember end DESC
            ) As RowNum, * From (   
            SELECT 
                m.id,m.login as Username,m.email as Email,m.registrationdate as RegDate,c.name as Country,m.lastlogindate as LastLogin,
                CASE WHEN (r.description='goldmember' or r.description='goldmember_forever') then 1 end As IsGoldMember 
            from member m 
            join country c on m.country_id = c.id
            join user_role ur on m.id=ur.member_id
            join role r on r.id=ur.role_id
            left join lastip l on m.id=l.user_id
            where r.description <> 'administrator' and m.login like @Username+'%' and l.address = @IP
            ) as aa
            Select * from @Temp Where RowNum> @PageNum-1 and RowNum<@PerPageResult+@PageNum
            order by 
            case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'id' then id end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'Username' then Username end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'Email' then Email end ASC
        ,   case when @sortOrder <> 'ASC' then cast(null as datetime) when @sortColumn = 'RegDate' then RegDate end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'Country' then Country end ASC
        ,   case when @sortOrder <> 'ASC' then cast(null as datetime) when @sortColumn = 'LastLogin' then LastLogin end ASC
        ,   case when @sortOrder <> 'ASC' then 0 when @sortColumn = 'IsGoldMember' then IsGoldMember end ASC

        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'id' then id end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'Username' then Username end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'Email' then Email end DESC
        ,   case when @sortOrder <> 'DESC' then cast(null as datetime) when @sortColumn = 'RegDate' then RegDate end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'Country' then Country end DESC
        ,   case when @sortOrder <> 'DESC' then cast(null as datetime) when @sortColumn = 'LastLogin' then LastLogin end DESC
        ,   case when @sortOrder <> 'DESC' then 0 when @sortColumn = 'IsGoldMember' then IsGoldMember end DESC
        END 
END

---

根据错误消息更新：

您需要检查select查询的数据长度，并确保@Temp表列定义正确。例如您可以将Country varchar25的列长度扩展到Country varchar50

另外，我认为你的陈述毫无意义。您的案例有效地做到了以下几点：

row_number() over (order by 0)

此外，您还可以使用标识1,1列ie声明@Temp表，如下所示；identityseed，递增以获取行号，而不使用row_number函数

现在您可以去掉行数函数。并简化if条件的插入，如下所示

if (@IP = '')
begin
    insert into @Temp
    select m.id,m.login as Username,m.email as Email,m.registrationdate as RegDate,
           c.name as Country,m.lastlogindate as LastLogin,
           CASE when (r.description='goldmember' or r.description='goldmember_forever') 
                 then 1 end As IsGoldMember 
    from member m join country c on m.country_id = c.id
         join user_role ur on m.id=ur.member_id
         join role r on r.id=ur.role_id
         left join lastip l on m.id=l.user_id
    where r.description <> 'administrator' and m.login like @Username+'%'
    order by 
         case when @sortOrder = 'asc' and @sortColumn = 'id' then id  
              when @sortOrder = 'asc' and @sortColumn = 'Username' then Username  
              when @sortOrder = 'asc' and @sortColumn = 'Email' then Email
              ...
              when @sortColumn = 'id' then id desc
              when @sortColumn = 'Username' then Username desc
              when @sortColumn = 'Email' then Email decs
              ...
         end
     --Now your select query to select required row numbers
     --Note the change to your where clase to bring correct results.
     Select * from @Temp 
     Where RowNum > @PerPageResult*(@PageNum-1) and RowNum <= @PerPageResult*@PageNum
end else
begin
    --you could follow the same step here.
end

---

正如我在评论中所写，你的第一个问题的答案是：

---

如果我很了解您的PRC，在@IP=的情况下，它应该返回一组wieder成员。我认为可能是用户名、电子邮件或国家/地区在成员表中比@Temp表的定义更长。将@Temp的列长度与表成员匹配

你问题的第二个答案：

如果@IP='some value'，则需要0秒，如果@IP=，则需要0秒 1:50分钟，这里怎么了

我认为你应该把你的prc分成两部分。使用@IP=和@somevalue运行这两个查询，并检查执行计划

如果您看到，它与“somevalue”配合良好，并且不需要索引，那么我认为您的查询是的牺牲品，这通常意味着您的执行计划经过优化以检索所有可能的内容，而进行更具选择性的搜索则不是最佳的

---

可能它是针对我链接的文章中描述的完整表扫描进行了优化。

如果我很了解您的PRC，在@IP=的情况下，它应该返回一组wieder成员。我认为可能是用户名、电子邮件或国家/地区在成员表中比@Temp表的定义更长。匹配@Temp wit table member的列长度。如果是这种情况，那么它也不应该与@IP='：：1'等一起工作。@AndrásOttó：更正列长度后，我能够得到结果，但执行结果需要1:45分钟，这是最差的。@AndrásOttó：如果@IP='some value'，则需要0秒，如果@IP=，需要1:50分钟。这里出了什么问题。可能在l.address=@IP上的搜索更改了quryplan并需要额外的时间。分别检查IF…ELSE两侧的queryplan，您将看到区别，并且可能调优顾问将为您提供一个Indexcase语句是否正确及其分页存储过程，因此我不能保留row_number函数。是的，它们是，但它们有意义吗？这里：当@sortOrder'asc'时为0，当@sortColumn='id'时为0，则id结束asc时，它将永远不会计算@sortColumn='id'。我想你在这儿等着呢。但简化版本在没有row_numberWhat（如果我传递@sortColumn='id'）的情况下也会这样做：而且，在自定义分页的情况下，row_numbers函数必须根据排序列进行排序，这样才有意义。问题不在这里，我不能在分页存储过程中保留case语句。这不是语法错误。但你的案例陈述不会产生你预期的结果。实际上，您所做的是将订单上的行数乘以0。我想我不能再解释你了…你能告诉我如何解决这个问题吗，因为我这里没有DBA。请阅读这篇关于参数嗅探文本的文章链接，这里有一些如何处理的建议。我认为行动计划第1节和第2节适合你的情况。

declare @Temp Table(RowNum int identity(1,1), id bigint, Username nvarchar(50), 
                    Email nvarchar(50), RegDate DateTime, Country varchar(25),
                    LastLogin DateTime, IsGoldMember varchar(1))

if (@IP = '')
begin
    insert into @Temp
    select m.id,m.login as Username,m.email as Email,m.registrationdate as RegDate,
           c.name as Country,m.lastlogindate as LastLogin,
           CASE when (r.description='goldmember' or r.description='goldmember_forever') 
                 then 1 end As IsGoldMember 
    from member m join country c on m.country_id = c.id
         join user_role ur on m.id=ur.member_id
         join role r on r.id=ur.role_id
         left join lastip l on m.id=l.user_id
    where r.description <> 'administrator' and m.login like @Username+'%'
    order by 
         case when @sortOrder = 'asc' and @sortColumn = 'id' then id  
              when @sortOrder = 'asc' and @sortColumn = 'Username' then Username  
              when @sortOrder = 'asc' and @sortColumn = 'Email' then Email
              ...
              when @sortColumn = 'id' then id desc
              when @sortColumn = 'Username' then Username desc
              when @sortColumn = 'Email' then Email decs
              ...
         end
     --Now your select query to select required row numbers
     --Note the change to your where clase to bring correct results.
     Select * from @Temp 
     Where RowNum > @PerPageResult*(@PageNum-1) and RowNum <= @PerPageResult*@PageNum
end else
begin
    --you could follow the same step here.
end