Discoverer Report parameter based on subquery

Question

Hi Guys,
I have following query which i need to convert into discoverer report
select hpah.EMPLOYEE_NUMBER,hpah.FIRST_NAME,hpah.LAST_NAME,hpah.PERSON_NAME,
--hpah.JOB_NAME,hpah.ASSIGNMENT_ORGANIZATION_NAME,
hpah.ASSIGNMENT_TYPE,hpah.USER_ASSIGNMENT_STATUS,
SUBSTR(pj.name, 1, instr(pj.name, '.', 1, 2) -1) job_code,
SUBSTR(pj.name, instr(pj.name, '.', 1, 2) + 1) job_title,
(select haou.ATTRIBUTE1 from hr_all_organization_units haou
where haou.ORGANIZATION_ID = hpah.ASSIGNMENT_ORGANIZATION_ID ) Function,
(select haou.ATTRIBUTE2 from hr_all_organization_units haou
where haou.ORGANIZATION_ID = hpah.ASSIGNMENT_ORGANIZATION_ID ) org_desc,
SUBSTR(hpah.ASSIGNMENT_ORGANIZATION_NAME, 1, 6) dept_code,
SUBSTR(hpah.ASSIGNMENT_ORGANIZATION_NAME, 7, LENGTH(hpah.ASSIGNMENT_ORGANIZATION_NAME)) dept_title,
hpah.GRADE_NAME,hpah.LOCATION_NAME,hpah.SUPERVISOR_NAME,
hpah.PERSON_START_DATE,hpah.ORIGINAL_DATE_OF_HIRE ,
hpah.SALARY_BASIS,hpah.BUSINESS_GROUP_ID,hpah.ASSIGNMENT_ID,
decode( hpah.SALARY_BASIS, 'ANNUAL', ppp.proposed_salary_n,
'HOURLY', (ppp.proposed_salary_n *2080),
ppp.proposed_salary_n
) salary,
sysdate run_date
from
hrfg_person_assignment_history hpah ,
per_pay_proposals ppp,
per_pay_bases ppb,
per_grades pg,
per_jobs pj
where hpah.ASSIGNMENT_ID = ppp.ASSIGNMENT_ID
and hpah.SALARY_BASIS = ppb.PAY_BASIS
and hpah.BUSINESS_GROUP_ID = ppb.BUSINESS_GROUP_ID
and hpah.GRADE_ID = pg.GRADE_ID(+)
and hpah.JOB_ID = pj.JOB_ID (+)
--and   hpah.EMPLOYEE_NUMBER = 100779
and hpah.PERSON_START_DATE IN
(SELECT MAX(hpah2.PERSON_START_DATE)
FROM hrfg_person_assignment_history hpah2
WHERE hpah2.EMPLOYEE_NUMBER = hpah.EMPLOYEE_NUMBER
AND hpah2.PERSON_START_DATE <= sysdate )
order by hpah.EMPLOYEE_NUMBER
i need to have sysdate as parameter in my report. I want data based on the date i provide.
how can i make this as an parameter?

Answer 1

Hi Prashant,
Subqueries are not Supported in Conditions..As of Disco Plus Rel 10.1.2.54.25
A plausible workaround can be:
1. Create a View with foll. Query
create or replace view TEST_VIEW as
select hpah.EMPLOYEE_NUMBER emp_no,hpah.FIRST_NAME,hpah.LAST_NAME,hpah.PERSON_NAME,
--hpah.JOB_NAME,hpah.ASSIGNMENT_ORGANIZATION_NAME,
hpah.ASSIGNMENT_TYPE,hpah.USER_ASSIGNMENT_STATUS,
SUBSTR(pj.name, 1, instr(pj.name, '.', 1, 2) -1) job_code,
SUBSTR(pj.name, instr(pj.name, '.', 1, 2) + 1) job_title,
(select haou.ATTRIBUTE1 from hr_all_organization_units haou
where haou.ORGANIZATION_ID = hpah.ASSIGNMENT_ORGANIZATION_ID ) Function,
(select haou.ATTRIBUTE2 from hr_all_organization_units haou
where haou.ORGANIZATION_ID = hpah.ASSIGNMENT_ORGANIZATION_ID ) org_desc,
SUBSTR(hpah.ASSIGNMENT_ORGANIZATION_NAME, 1, 6) dept_code,
SUBSTR(hpah.ASSIGNMENT_ORGANIZATION_NAME, 7, LENGTH(hpah.ASSIGNMENT_ORGANIZATION_NAME)) dept_title,
hpah.GRADE_NAME,hpah.LOCATION_NAME,hpah.SUPERVISOR_NAME,
hpah.PERSON_START_DATE,hpah.ORIGINAL_DATE_OF_HIRE ,
hpah.SALARY_BASIS,hpah.BUSINESS_GROUP_ID,hpah.ASSIGNMENT_ID,
decode( hpah.SALARY_BASIS, 'ANNUAL', ppp.proposed_salary_n,
'HOURLY', (ppp.proposed_salary_n *2080),
ppp.proposed_salary_n
) salary,
sysdate run_date
from
hrfg_person_assignment_history hpah ,
per_pay_proposals ppp,
per_pay_bases ppb,
per_grades pg,
per_jobs pj
where hpah.ASSIGNMENT_ID = ppp.ASSIGNMENT_ID
and hpah.SALARY_BASIS = ppb.PAY_BASIS
and hpah.BUSINESS_GROUP_ID = ppb.BUSINESS_GROUP_ID
and hpah.GRADE_ID = pg.GRADE_ID(+)
and hpah.JOB_ID = pj.JOB_ID (+)
--and hpah.EMPLOYEE_NUMBER = 100779
order by hpah.EMPLOYEE_NUMBER
2. Create another table say TEST_TAB
create table TEST_TAB (emp_no, start_dt) as
SELECT hpah2.EMPLOYEE_NUMBER , MAX(hpah2.PERSON_START_DATE) PERSON_START_DATE
FROM hrfg_person_assignment_history hpah2
GROUP BY hpah2.EMPLOYEE_NUMBER
3. Add both of them in Disco Admin and create a join between TEST_VIEW.emp_no and TEST_TAB.emp_no
4. Bring both these Objects in a new report in Disco Plus
5. Create a New Parameter (Base it on PERSON_START_DATE Col of TEST_TAB)
6. Choose Option Create Condition with operator <=
7. Checkmark "Require User to Enter a Value
8. Execute Report
I believe this should work. Either ways let me know if it helps or u get another workaround. (This scenario looks quite interesting)
Thanks,
Chinmay