Problem with SQL Statement for Result Filtering

Question

Dear Visual Composer Experts,
Here is another Question from me: I have a SQL Query that is working as the data service
Select AB.AgingBandID, AB.AgingBand,
Sum(Case when priority='Emergency' then '1' Else 0 End) as [Emergency],
Sum(Case when priority='Ugent' then '1' Else 0 End) as Ugent,
Sum(Case when priority='High' then '1' Else 0 End) as High,
Sum(Case when priority='Medium' then '1' Else 0 End) as Medium,
Sum(Case when priority='Low' then '1' Else 0 End) as Low
from DimAgingBand AB left outer join
(Select AgingBandID , priority , yeardesc
from vNotifications where YearDesc = (select year(getdate())-1)) as vN
on AB.AgingBandID=vN.AgingBandID
where AB.AgingBandID<>'1'  
Group by  AB.AgingBandID, AB.AgingBand
Order by AB.AgingBandID
That would return me a table as in the following:
     Agingband     E     U     H     M     L
     < 1week     0     0     0     0     1
     1 - 2 weeks     0     0     0     0     0
     2 - 4weeks     0     0     0     0     1
> 1month     8     2     1     1     6
Now that I would like to add some parameters to filter the result, so I modify the query and put it in the SQL Statement input port of the same data service. The query is like this:
     "Select AB.AgingBandID, AB.AgingBand,Sum(Case when priority='Emergency' then '1' Else 0 End) as [Emergency],Sum(Case when priority='Ugent' then '1' Else 0 End) as Ugent,Sum(Case when priority='High' then '1' Else 0 End) as High,Sum(Case when priority='Medium' then '1' Else 0 End) as Medium,Sum(Case when priority='Low' then '1' Else 0 End) as Low from DimAgingBand AB left outer join (Select AgingBandID , priority , yeardesc from vNotifications where YearDesc like '2009%' and Branch like '" & if(STORE@selectedBranch=='ALL', '%', STORE@selectedBranch) & "' and MainWorkCentre like '%') as vN on AB.AgingBandID=vN.AgingBandID where AB.AgingBandID<>'1' Group by AB.AgingBandID, AB.AgingBand Order by AB.AgingBandID"
However this input port query keeps giving me error as NullPointerException. I have actually specified a condition where the query will run if only STORE@selectedBranch != u2018u2019.
I have other filtering queries working but they are not as complicated query as this one. Could it be possible that query in the input port cannot handle left outer join?
Could it be anything else?
Help is very much appreciated.
Thanks & Regard,
Sarah

Answer 1

Hi,
Thank you very much for your replys. I've tested if the dynamic value of the condition is integer, it's OK
But if the ClassID type is not integer, it's string, I write  a SQL Statement like:
"Select DBADMIN.Class.ClassName from DBADMIN.Class where DBADMIN.Class.ClassID = '1' "
or with dynamic condition:
"Select DBADMIN.Class.ClassName from DBADMIN.Class where DBADMIN.Class.ClassID = '"&@ClassID&"'"
or I write the SQL Statement for insert/update/delete data,
I always have errors.
I've tested if the dynamic value of the condition is integer, it's OK
Do you know this problem ?
Thank you very much & kindly regards,
Tweety