SQL Server中的系统连接路径
我正在进行一个迁移项目,需要将以下Oracle查询转换为它的SQL Server等效项SQL Server中的系统连接路径,sql,oracle,sql-server-2008,recursion,common-table-expression,Sql,Oracle,Sql Server 2008,Recursion,Common Table Expression,我正在进行一个迁移项目,需要将以下Oracle查询转换为它的SQL Server等效项 select SYS_CONNECT_BY_PATH (b.actionnr,'/') as FATHER, SYS_CONNECT_BY_PATH (b.actionnr,' | ') as REFPATH, LEVEL, (select count(p.refactionnr) from zisjob.zj_action p where p.refactionnr=b.actionnr) Chi
select SYS_CONNECT_BY_PATH (b.actionnr,'/') as FATHER, SYS_CONNECT_BY_PATH (b.actionnr,' | ') as REFPATH, LEVEL,
(select count(p.refactionnr) from zisjob.zj_action p where p.refactionnr=b.actionnr)
Childs, b.* from
( select NVL(x.ANZFiles,0) ANZFiles, act.actionnr, act.refactionnr, act.lfno, act.jobnr, act."TYPE", act.actiontype
from zisjob.zj_action act, zisjob.zj_actiontype t,
( select f.lno, count(f.filenr) as ANZFiles from zisjob.zj_file f where f.lno != f.lfno Group by f.lno )x
where act.lfno=10 and act.actiontype = t.typeid(+) and act.actionnr = x.lno(+) )
b start with b.actionnr in
(select b.actionnr from zisjob.zj_action b where b.lfno = 10 and b.refactionnr is null)
connect by nocycle prior b.actionnr=b.refactionnr order by 1 desc, 2 asc
我用CTEs来做这个。到目前为止,我已经得出以下结论:
with h$cte as
(
select
cast (convert(varchar,b.actionnr)+'/' as varchar(max)) as FATHER,
cast(convert(varchar,b.actionnr)+' | ' as varchar(max)) as REFPATH,
1 as LEVEL,
--cast (row_number() over (order by @@spid) as varchar(max)) as LEVEL,
(select count(p.refactionnr) from zisjob.zj_action p
where p.refactionnr = b.actionnr) Childs,
b.*
from
(select
isnull(x.ANZFiles, 0) ANZFiles, act.actionnr, act.refactionnr, act.lfno,
act.jobnr, act."TYPE", act.actiontype
from zisjob.zj_action act
left outer join zisjob.zj_actiontype t on act.actiontype = t.typeid
left outer join
(select f.lno, count(f.filenr) as ANZFiles
from zisjob.zj_file f
where f.lno != f.lfno Group by f.lno ) x on act.actionnr = x.lno
where act.lfno = 10) b
where
b.actionnr in
(select b.actionnr from zisjob.zj_action b
where b.lfno = 10 and b.refactionnr is null)
UNION ALL
select
CAST(FATHER + '/'+ b.ACTIONNR as varchar(max)) as FATHER,
CAST(REFPATH + '|'+b.ACTIONNR AS VARCHAR(MAX)) as REFPATH,
h$cte.LEVEL + 1 as LEVEL,
(select count(p.refactionnr) from zisjob.zj_action p
where p.refactionnr = b.actionnr) Childs,
b.*
from
(select isnull(x.ANZFiles, 0) ANZFiles, act.actionnr, act.refactionnr,
act.lfno, act.jobnr, act."TYPE", act.actiontype
from zisjob.zj_action act
left outer join zisjob.zj_actiontype t on act.actiontype = t.typeid
left outer join
(select f.lno, count(f.filenr) as ANZFiles from zisjob.zj_file f
where f.lno != f.lfno Group by f.lno) x on act.actionnr = x.lno
where act.lfno = 10) b,
h$cte
where
b.actionnr in
(select b.actionnr from zisjob.zj_action b
where b.lfno = 10 and b.refactionnr is null)
and h$cte.ACTIONNR = h$cte.REFACTIONNR
)
select <columns> from h$cte
翻译后的查询出现以下错误:
Msg 467,16级,状态1,第1行
递归公共表表达式“h$cte”的递归部分中不允许使用GROUP BY、HAVING或AGGRATE函数
Msg 462,16级,状态1,第1行
递归公共表表达式“h$cte”的递归部分不允许外部联接
我怎样才能解决这个问题?非常感谢任何形式的帮助。提前感谢。我终于解决了这个问题:
WITH dummy AS(
select isnull(x.ANZFiles,0) ANZFiles, act.actionnr, act.refactionnr, act.lfno, act.jobnr, act."TYPE", act.actiontype
from zisjob.zj_action act left outer join zisjob.zj_actiontype t on act.actiontype = t.typeid left outer join
( select f.lno, count(f.filenr) as ANZFiles from zisjob.zj_file f
where f.lno != f.lfno Group by f.lno )x on act.actionnr = x.lno
where act.lfno=10),
dummy2 as(
select count(p.refactionnr) as Childs
from zisjob.zj_action p inner join dummy b on p.refactionnr=b.actionnr
),
h$cte as(
select
cast ('/'+convert(varchar,b.actionnr) as varchar(max)) as FATHER,
cast(' | '+convert(varchar,b.actionnr) as varchar(max)) as REFPATH,
1 as LEVEL,
c.Childs,
--cast (row_number() over (order by @@spid) as varchar(max)) as LEVEL,
b.*
from dummy b, dummy2 c
where b.actionnr in
(select b.actionnr from zisjob.zj_action b where b.lfno = 10 and b.refactionnr is null)
UNION ALL
select
CAST(FATHER + '/'+ b.ACTIONNR as varchar(max)) as FATHER,
CAST(REFPATH + '|'+b.ACTIONNR AS VARCHAR(MAX)) as REFPATH,
h$cte.LEVEL + 1 as LEVEL,c.Childs,
b.*
from dummy b, dummy2 c, h$cte
where b.actionnr in
(select b.actionnr from zisjob.zj_action b where b.lfno = 10 and b.refactionnr is null)
and h$cte.ACTIONNR = h$cte.REFACTIONNR
)
select * from h$cte
因为我不允许在CTE的递归成员中编写外部联接和分组,也不允许在CTE的递归成员中拥有或聚合函数,所以我将它移到了一个新的CTE下。这很有魅力
干杯 我终于解决了这个问题:
WITH dummy AS(
select isnull(x.ANZFiles,0) ANZFiles, act.actionnr, act.refactionnr, act.lfno, act.jobnr, act."TYPE", act.actiontype
from zisjob.zj_action act left outer join zisjob.zj_actiontype t on act.actiontype = t.typeid left outer join
( select f.lno, count(f.filenr) as ANZFiles from zisjob.zj_file f
where f.lno != f.lfno Group by f.lno )x on act.actionnr = x.lno
where act.lfno=10),
dummy2 as(
select count(p.refactionnr) as Childs
from zisjob.zj_action p inner join dummy b on p.refactionnr=b.actionnr
),
h$cte as(
select
cast ('/'+convert(varchar,b.actionnr) as varchar(max)) as FATHER,
cast(' | '+convert(varchar,b.actionnr) as varchar(max)) as REFPATH,
1 as LEVEL,
c.Childs,
--cast (row_number() over (order by @@spid) as varchar(max)) as LEVEL,
b.*
from dummy b, dummy2 c
where b.actionnr in
(select b.actionnr from zisjob.zj_action b where b.lfno = 10 and b.refactionnr is null)
UNION ALL
select
CAST(FATHER + '/'+ b.ACTIONNR as varchar(max)) as FATHER,
CAST(REFPATH + '|'+b.ACTIONNR AS VARCHAR(MAX)) as REFPATH,
h$cte.LEVEL + 1 as LEVEL,c.Childs,
b.*
from dummy b, dummy2 c, h$cte
where b.actionnr in
(select b.actionnr from zisjob.zj_action b where b.lfno = 10 and b.refactionnr is null)
and h$cte.ACTIONNR = h$cte.REFACTIONNR
)
select * from h$cte
因为我不允许在CTE的递归成员中编写外部联接和分组,也不允许在CTE的递归成员中拥有或聚合函数,所以我将它移到了一个新的CTE下。这很有魅力
干杯 我通过创建一个数据库函数解决了这个问题
创建一个类似于ufn_GetParentPath的函数,使用它而不是SYS_CONNECT_BY_PATH传递ID作为参数
CREATE FUNCTION [dbo].[ufn_GetParentPath] ( @pCurrentNodeID INT )
RETURNS VARCHAR(1000)
AS
BEGIN
DECLARE @vCurrentNodeName VARCHAR(50)
DECLARE @vParentID INT
IF @pCurrentNodeID IS NULL OR @pCurrentNodeID = 0
RETURN NULL
SELECT @vCurrentNodeName = [Name], @vParentID = [ParentID]
FROM [dbo].[Hierarchy]
WHERE [ID] = @pCurrentNodeID
RETURN ISNULL([dbo].[ufn_GetParentPath] ( @vParentID ) + '/', '') + @vCurrentNodeName
END
GO
我通过创建一个数据库函数解决了这个问题
创建一个类似于ufn_GetParentPath的函数,使用它而不是SYS_CONNECT_BY_PATH传递ID作为参数
CREATE FUNCTION [dbo].[ufn_GetParentPath] ( @pCurrentNodeID INT )
RETURNS VARCHAR(1000)
AS
BEGIN
DECLARE @vCurrentNodeName VARCHAR(50)
DECLARE @vParentID INT
IF @pCurrentNodeID IS NULL OR @pCurrentNodeID = 0
RETURN NULL
SELECT @vCurrentNodeName = [Name], @vParentID = [ParentID]
FROM [dbo].[Hierarchy]
WHERE [ID] = @pCurrentNodeID
RETURN ISNULL([dbo].[ufn_GetParentPath] ( @vParentID ) + '/', '') + @vCurrentNodeName
END
GO