How to avoid Recursive CTE repeating the anchor values - sql

Question

I am using following CTE to get hierarchical structure of manager and employees, i have multiple managers for one employee, in this case i do not want CTE to repeat for that employee again and again as it is doing in my code -
getemp() is a simple function returning employeeid, name and managerID
;With hierarchy as
(
select [Level]=1 , * from dbo.getemp() where managerid = 1
union all
select [Level]+1 , e.* from getemp() e
join hierarchy h on h.employeeid = e.managerid
)
Select * from hierarchy
After edit -
Following approach working for me. Is it possible with CTE ?
SET NOCOUNT ON;
DECLARE #Rows int
SELECT [Level] = ISNULL(1,0),
employeeid = ISNULL(employeeid, 0 ),
empname = CAST(empname as varchar(10)),
managerid = ISNULL(managerid,0)
into #Temp1
from dbo.getemp() as a1
where a1.managerid = #Top1
--select * from #Temp1
SELECT #Rows=##ROWCOUNT
DECLARE #I INT = 2;
while #Rows > 0
BEGIN
Insert into #Temp1
select #I as Level, b.employeeid, b.empname, b.managerid from #Temp1 as e
inner join (select [employeeid], [empname], [managerid] from dbo.GetEmp()) as b on b.managerid = e.employeeid
where e.Level = #I - 1
and not exists (
SELECT 1 FROM #Temp1 t
WHERE b.employeeid = t.employeeid
AND b.managerid = t.managerid);
SELECT #Rows=##ROWCOUNT
--SELECT #Rows AS Rows
IF #Rows > 0
BEGIN
SELECT #I = #I + 1;
END
END
select distinct * from #Temp1
END

Answer 1

Since you have several managers, which means that people can also be in several different levels due to having different levels in the manager, you could just take the minimum levels for each branch with something like this:
;With hierarchy as
(
select [Level]=1 , * from dbo.getemp() where managerid = 1
union all
select [Level]+1 , e.* from getemp() e
join hierarchy h on h.employeeid = e.managerid
)
Select min(Level) as Level, employeeid, name, managerid from hierarchy
group by employeeid, name, managerid
Using a function to return all the employees in every recursion might not be the best solution regarding to performance, especially if it's not an inline function. You might want to consider using for example a temp. table if you can't read the tables themselves directly.

Answer 2

Couldnt find the solution using CTE, so I have used the while loop to avoid the repeating anchors, here the code ..
DECLARE #Rows int
SELECT [Level] = ISNULL(1,0),
employeeid = ISNULL(employeeid, 0 ),
empname = CAST(empname as varchar(10)),
managerid = ISNULL(managerid,0)
into #Temp1
from dbo.getemp() as a1
where a1.managerid = #Top1
--select * from #Temp1
SELECT #Rows=##ROWCOUNT
DECLARE #I INT = 2;
while #Rows > 0
BEGIN
Insert into #Temp1
select #I as Level, b.employeeid, b.empname, b.managerid from #Temp1 as e
inner join (select [employeeid], [empname], [managerid] from dbo.GetEmp()) as b on b.managerid = e.employeeid
where e.Level = #I - 1
and not exists (
SELECT 1 FROM #Temp1 t
WHERE b.employeeid = t.employeeid
AND b.managerid = t.managerid);
SELECT #Rows=##ROWCOUNT
--SELECT #Rows AS Rows
IF #Rows > 0
BEGIN
SELECT #I = #I + 1;
END
END
select distinct * from #Temp1
END