Oracle use variable in IN clause - sql

Question

The following query will be use as a sub-query in a IN clause within a trigger
select RECEIPT_USER from ABCD.GENERIC_FF_EVNT_LAST
WHERE RECEIPT_USER is not null
group by RECEIPT_USER
having max(load_Date) > add_months(SYSDATE,-48)
Simple Trigger
create or replace TRIGGER ABCD.T_EVNTS_UPSERT
FOR INSERT OR UPDATE ON ABCD.EVNTS
COMPOUND TRIGGER
Type r_evnts_type Is Record (
shpmt_unts_id ABCD.evnts.shpmt_unts_id%Type,
evnts_id ABCD.evnts.evnts_id%Type,
evnt_date ABCD.evnts.evnt_date%Type,
last_updt_user ABCD.evnts.db_rw_last_updt_usr%Type
);
Type rt_evnts_type Is Table Of r_evnts_type Index By Pls_Integer;
--v_USER_LIST ABCD.GENERIC_FF_EVNT_LAST.RECEIPT_USER%TYPE;
i Pls_integer;
rt_1 rt_evnts_type;
rt_2 rt_evnts_type;
rt_3 rt_evnts_type;
rt_4 rt_evnts_type;
rt_5 rt_evnts_type;
rt_6 rt_evnts_type;
rt_7 rt_evnts_type;
rt_8 rt_evnts_type;
rt_9 rt_evnts_type;
rt_10 rt_evnts_type;
Before Each Row Is
Begin
--Not relevant
End Before Each Row;
AFTER EACH ROW IS
BEGIN
--the data of tabletype gets populated
END AFTER EACH ROW;
AFTER STATEMENT IS
BEGIN
--There are 10s of these
If (rt_1.Exists(1)) Then
ForAll i In 1 .. rt_1.Last
UPDATE ABCD.SHPMT_UNTS SU
SET SU.CONUS_ARRIVAL_DT = rt_1(i).EVNT_DATE,
SU.CONUS_ARRIVAL_EVENTID = rt_1(i).EVNTS_ID,
SU.CONUS_FLAG = '1'
WHERE SU.SHPMT_UNTS_ID = rt_1(i).SHPMT_UNTS_ID
AND (SU.CONUS_DEPARTURE_EVENTID IS NULL or rt_1(i).last_updt_user in
(select RECEIPT_USER from ABCD.GENERIC_FF_EVNT_LAST
WHERE RECEIPT_USER is not null
group by RECEIPT_USER
having max(load_Date) > add_months(SYSDATE,-48))); <--- long and less readable because there are 10s of these
End If;
---If (rt_2.Exists(1)) Then
---If (rt_3.Exists(1)) Then
End After Statement;
END t_evnts_upsert;
I am trying to see if there is a way to store the result of the subquery in a variable/cursor and then use it in the IN clause, this way I don't have to repetitively call the subquery each time.
What I have tried:
Method 1 Use cursor:
cursor user_list is
select RECEIPT_USER from ABCD.GENERIC_FF_EVNT_LAST
WHERE RECEIPT_USER is not null
group by RECEIPT_USER
having max(load_Date) > add_months(SYSDATE,-48);
and use it so the where Clause become:
WHERE SU.SHPMT_UNTS_ID = rt_conus_ar(i).SHPMT_UNTS_ID
AND (SU.CONUS_DEPARTURE_EVENTID IS NULL or rt_conus_ar(i).last_updt_user in user_list.RECEIPT_USER)
Method 2 Store into a variable:
v_USER_LIST ABCD.GENERIC_FF_EVNT_LAST.RECEIPT_USER%TYPE;
Then do Select INTO v_USER_LIST.......
this doesn't work either
Is there a way to store the result of the subquery into a variable of some sort and use it in the IN clause?

Answer 1

In general you can do it.
declare
type rt_evnts_type is table of VARCHAR2(100);
rt_events rt_evnts_type;
begin
select RECEIPT_USER
bulk collect into rt_events
from ABCD.GENERIC_FF_EVNT_LAST
WHERE RECEIPT_USER is not null
group by RECEIPT_USER
having max(load_Date) > add_months(SYSDATE,-48);
UPDATE ABCD.SHPMT_UNTS SU
SET SU.CONUS_ARRIVAL_DT = rt_1(i).EVNT_DATE,
SU.CONUS_ARRIVAL_EVENTID = rt_1(i).EVNTS_ID,
SU.CONUS_FLAG = '1'
WHERE SU.SHPMT_UNTS_ID = rt_1(i).SHPMT_UNTS_ID
AND (
SU.CONUS_DEPARTURE_EVENTID IS NULL
OR rt_1(i).last_updt_user MEMBER OF rt_events
);
end;
You can also use expression SELECT COLUMN_VALUE FROM TABLE(rt_events)
Note, I did not test above code. I am not 100% sure, perhaps you have to define the type as database object in order to use it SQL query, i.e.
CREATE TYPE rt_evnts_type is table of VARCHAR2(100);
You may review your data design, why do you create 10 different variables of rt?
A more generic approach could be this one:
Type r_evnts_type Is Record (
shpmt_unts_id ABCD.evnts.shpmt_unts_id%Type,
evnts_id ABCD.evnts.evnts_id%Type,
evnt_date ABCD.evnts.evnt_date%Type,
last_updt_user ABCD.evnts.db_rw_last_updt_usr%Type,
rt_type NUMBER
);
Type rt_evnts_type Is Table Of r_evnts_type;
rt_evnts rt_evnts_type;
...
WHERE CONUS_ARRIVAL_EVENTID =ANY
(select EVNTS_ID
from TABLE(rt_evnts)
where rt_type = 1)
FOR r in 1..5 LOOP
...
WHERE CONUS_ARRIVAL_EVENTID =ANY
(select EVNTS_ID
from TABLE(rt_evnts)
where rt_type = r)
END LOOP;
The Multiset Operators and Multiset Conditions may make your life easier.