Issue with Read only VO Query bind parameters

Question

Hi Experts,
Working in Jdev 11.1.1.3.0
I am face one issue, probably its very common to all of us, bcoz i to do the same thing in N number of times.
Issue:
select count(*) as cnt from emp
where
((:BindEmpId is NOT NULL AND EMP_ID = :BindEmpId) AND
(DEPT_ID IS NULL OR DEPT_ID =: BindDeptId));
when i run this query its giving correct result(count is 0) but usually i written like
select count(*) as cnt from emp
where
((:BindEmpId is NOT NULL AND EMP_ID = :BindEmpId) AND
(BindDeptId IS NULL OR DEPT_ID =: BindDeptId));
this time its giving count is 1, which is wrong.
Data in data base:
ID     DeptID     value EmpID
226     1519     jh 601     
So which one is correct?

Answer 1

Well, the two select statements are for different use cases and we can't decide which is the correct one as we don't know the use case.
Your data looks like
ID   DeptID value EmpID
226  1519   jh    601 There are some decisions we can't make with only one row in the table. We don't know if DepIt can be null in the table and/or EmpId can be null. This information is vital for your select statements.
Next we don't know how you want to handle the query if one or both bind parameters are null.
Should the query return 0 in this case or should the query just omit the part of the query if the bind variable is null (and then return the result found with the remaining query)?
We can't possible answer this.
You need to provide more information...
Timo