缓慢加入多个条件

Question

那加入[docSVsys]为[docSVsysReturn]是杀害查询
三个条件联接是杀死它 - 它变成一个循环连接
它需要2分钟
如果我拿出我尝试了合并和散列连接，但他们（或者[docSVsysReturn]。[sParID] = [coreCTE]。[sParID]和[docSVsysReturn]。[sParID] = [docSVsysReturn]。[sID]）它在1秒钟内运行s 不允许
涉及的列被索引
[sID]是PK和[sParID]是必需的，FK是[sID]
有关如何修复性能的任何想法？

; WITH coreCTE AS (
    select [docSVsysAuth].[sID], [docSVsysAuth].[sParID] 
    from [docSVsys] as [docSVsysAuth] with (nolock) 
    join [docSVtext] as [Table] with (nolock) 
     on [Table].[sID] = [docSVsysAuth].[sID] 
    and [docSVsysAuth].[visibility] in (0) 
    and [Table].[fieldID] = '108' 
    where [table].[value] = 'Andy Wipper<andy.wipper@company.com>' 
) 
,  [cteFinal] AS (
select distinct [docSVsysReturn].[sID], [docSVsysReturn].[sParID] 
    from [coreCTE] 
    join [docSVsys] as [docSVsysReturn] with (nolock) 
    on ([docSVsysReturn].[sID] = [coreCTE].[sID] 
      or 
     ([docSVsysReturn].[sParID] = [coreCTE].[sParID] and [docSVsysReturn].[sParID] = [docSVsysReturn].[sID]) 
     ) 
    and [docSVsysReturn].[visibility] in (0) 
) 
select [cteFinal].[sID], [cteFinal].[sParID] 
    from [cteFinal] 
order by [cteFinal].[sID], cteFinal.[sParID] 

这有助于有点

on ([docSVsysReturn].[sID] = [coreCTE].[sID] 
     or 
    ([docSVsysReturn].[sID] <> [coreCTE].[sID] and [docSVsysReturn].[sParID] = [coreCTE].[sParID] and [docSVsysReturn].[sParID] = [docSVsysReturn].[sID]) 
    ) 

Answer 1

在从不同的角度去固定它
基本上把OR在后面的比赛

; WITH coreCTE AS (
    select distinct [docSVsysAuth].[sID], [docSVsysAuth].[sParID] 
    from [docSVsys] as [docSVsysAuth] with (nolock) 
    join [docSVtext] as [Table] with (nolock) 
    on [Table].[sID] = [docSVsysAuth].[sID] 
    and [docSVsysAuth].[visibility] in (0) 
    and [Table].[fieldID] = '108' 
    where (( [table].[value] = 'Andy Wipper<andy.wipper@company.com>') 
) 
) 
,  [cteFinal] AS (
select distinct [docSVsysReturn].[sID], [docSVsysReturn].[sParID] 
    from [coreCTE] 
    join [docSVsys] as [docSVsysReturn] with (nolock) 
    on ([docSVsysReturn].[sParID] = [coreCTE].[sParID] 
     and 
     ( [docSVsysReturn].[sID] = [coreCTE].[sID] -- the document 
      or (  [docSVsysReturn].[sParID] = [docSVsysReturn].[sID] -- it is a parent 
        and [coreCTE].[sParID] <> [coreCTE].[sID] -- already have the parent 
        and [docSVsysReturn].[visibility] in (0) 
       ) -- or the parent 
     ) 
     ) 
) 
select [cteFinal].[sID], [cteFinal].[sParID] -- ,bulkUpField 
    from [cteFinal] 
order by [cteFinal].[sID], cteFinal.[sParID] 

Answer 2

我建议你尝试写一个UNION，而不是查询。试试看。

select [docSVsysReturn].[sID], [docSVsysReturn].[sParID] 
    from [coreCTE] 
    join [docSVsys] as [docSVsysReturn] with (nolock) 
    on [docSVsysReturn].[sID] = [coreCTE].[sID] 
    and [docSVsysReturn].[visibility] in (0) 

UNION 

select [docSVsysReturn].[sID], [docSVsysReturn].[sParID] 
    from [coreCTE] 
    join [docSVsys] as [docSVsysReturn] with (nolock) 
    on [docSVsysReturn].[sParID] = [coreCTE].[sParID] 
    and [docSVsysReturn].[sParID] = [docSVsysReturn].[sID] 
    and [docSVsysReturn].[visibility] in (0)