Currval acting like nextval

Question

It will be very beneficial if you help me solve this problem and greatly appreciated. Please focus on the problem I’m having not why I’m doing what I’m doing. I’m trying to avoid a cursor solution and I can’t accomplish this using any group by or aggregate/analytical functions. This approach is basically trying to apply a group by while forcing the group by to operate on the data in a specific order(not the group by order). Sounds confusing, but if we focus on the problem… why is currval giving me the nextval we should get somewhere? Thanks.
Query:
INSERT INTO WAREHOUSE_DEV.STG_COV_SUBPROGRAM_FUN_CS1 (
CASENUMBER, PREV_CASENUMBER, CLIENT_NUMBER,
PREV_CLIENT_NUMBER, PROGRAMNAME, PREV_PROGRAMNAME,
SUBPROGRAMNAME, PREV_SUBPROGRAMNAME, COVERAGE_YEARMONTH,
CLIENT_COVERAGE, PREV_CLIENT_COVERAGE, CS_COUNT)
select CASENUMBER, PREV_CASENUMBER, CLIENT_NUMBER,
PREV_CLIENT_NUMBER, PROGRAMNAME, PREV_PROGRAMNAME,
SUBPROGRAMNAME, PREV_SUBPROGRAMNAME, COVERAGE_YEARMONTH,
CLIENT_COVERAGE, PREV_CLIENT_COVERAGE,
case when
CS_COUNT = 0 then 0
else case when CS_COUNT = 1 then 1
else case when (CS_COUNT = -1 AND LAG (CS_COUNT ) OVER (ORDER BY CASENUMBER, CLIENT_NUMBER, PROGRAMNAME, SUBPROGRAMNAME, COVERAGE_YEARMONTH) <> 0 ) then -1
else 1 -- catches tricky restart.....
end
end
end CS_COUNT
from
(select CASENUMBER, PREV_CASENUMBER, CLIENT_NUMBER,
PREV_CLIENT_NUMBER, PROGRAMNAME, PREV_PROGRAMNAME,
SUBPROGRAMNAME, PREV_SUBPROGRAMNAME, COVERAGE_YEARMONTH,
CLIENT_COVERAGE, PREV_CLIENT_COVERAGE,
case when
(CASENUMBER = PREV_CASENUMBER AND CLIENT_NUMBER = PREV_CLIENT_NUMBER AND PROGRAMNAME = PREV_PROGRAMNAME AND SUBPROGRAMNAME = PREV_SUBPROGRAMNAME AND PREV_CLIENT_COVERAGE=0) then 0
else case when (CASENUMBER = PREV_CASENUMBER AND CLIENT_NUMBER = PREV_CLIENT_NUMBER AND PROGRAMNAME = PREV_PROGRAMNAME AND SUBPROGRAMNAME = PREV_SUBPROGRAMNAME AND PREV_CLIENT_COVERAGE=1) then -1 -- EXCEPT FOR WHEN PREV PREV_CLIENT_COVERAGE WAS ZERO THEN 1.
else case when ((CASENUMBER <> PREV_CASENUMBER OR CLIENT_NUMBER <> PREV_CLIENT_NUMBER OR PROGRAMNAME <> PREV_PROGRAMNAME OR SUBPROGRAMNAME <> PREV_SUBPROGRAMNAME) AND PREV_CLIENT_COVERAGE=1) then-1
else case when ((CASENUMBER <> PREV_CASENUMBER OR CLIENT_NUMBER <> PREV_CLIENT_NUMBER OR PROGRAMNAME <> PREV_PROGRAMNAME OR SUBPROGRAMNAME <> PREV_SUBPROGRAMNAME) AND PREV_CLIENT_COVERAGE=0) then 1
else 88
end
end
end
end CS_COUNT
from WAREHOUSE_DEV.STG_COVERAGE_SUBPROGRAM_FUN_CS
where CASENUMBER = '0042432' and client_number = '0000942256'
ORDER BY CASENUMBER, CLIENT_NUMBER, PROGRAMNAME, SUBPROGRAMNAME, COVERAGE_YEARMONTH, CLIENT_COVERAGE);
PRODUCES RESULTS:
0042432     0042419     0000942256     0001571135     Child Care     Child Care     Child Care     Child Care     201008     1     0     1 nextval
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201009     1     1     -1 currval
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201010     1     1     -1 currval
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201011     1     1     -1 currval
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201012     1     1     -1 currval
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201101     1     1     -1 currval
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201102     1     1     -1 currval
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201103     0     1     -1 currval
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201104     1     0     0 0
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201105     1     1     1 nextval
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201106     1     1     -1 currval
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201107     1     1     -1 currval
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201108     1     1     -1 currval
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201109     1     1     -1 currval
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201110     1     1     -1 currval
The key is that when you have cs_count of 1… get nexval, when you have value of -1 get currval, zero is zero… The first row would get nexval…. So 1 the next seven rows should be 1, then next row 0, the next row 2 and the last 5 rows will also be 2.
That’s not what happens.
Query with currval and nextval:
Query:
INSERT INTO WAREHOUSE_DEV.STG_COV_SUBPROGRAM_FUN_CS1 (
CASENUMBER, PREV_CASENUMBER, CLIENT_NUMBER,
PREV_CLIENT_NUMBER, PROGRAMNAME, PREV_PROGRAMNAME,
SUBPROGRAMNAME, PREV_SUBPROGRAMNAME, COVERAGE_YEARMONTH,
CLIENT_COVERAGE, PREV_CLIENT_COVERAGE, CS_COUNT)
select CASENUMBER, PREV_CASENUMBER, CLIENT_NUMBER,
PREV_CLIENT_NUMBER, PROGRAMNAME, PREV_PROGRAMNAME,
SUBPROGRAMNAME, PREV_SUBPROGRAMNAME, COVERAGE_YEARMONTH,
CLIENT_COVERAGE, PREV_CLIENT_COVERAGE,
case when
(CS_COUNT = 0) then (0/warehouse_dev.cs_count_seq.nextval)
else case when (CS_COUNT = -1 AND LAG (CS_COUNT ) OVER (ORDER BY CASENUMBER, CLIENT_NUMBER, PROGRAMNAME, SUBPROGRAMNAME, COVERAGE_YEARMONTH) <> 0 ) then warehouse_dev.cs_count_seq.currval
else case when (CS_COUNT = 1) then warehouse_dev.cs_count_seq.nextval
else warehouse_dev.cs_count_seq.nextval
end
end
end CS_COUNT
from
(select CASENUMBER, PREV_CASENUMBER, CLIENT_NUMBER,
PREV_CLIENT_NUMBER, PROGRAMNAME, PREV_PROGRAMNAME,
SUBPROGRAMNAME, PREV_SUBPROGRAMNAME, COVERAGE_YEARMONTH,
CLIENT_COVERAGE, PREV_CLIENT_COVERAGE,
case when
(CASENUMBER = PREV_CASENUMBER AND CLIENT_NUMBER = PREV_CLIENT_NUMBER AND PROGRAMNAME = PREV_PROGRAMNAME AND SUBPROGRAMNAME = PREV_SUBPROGRAMNAME AND PREV_CLIENT_COVERAGE=0) then 0
else case when (CASENUMBER = PREV_CASENUMBER AND CLIENT_NUMBER = PREV_CLIENT_NUMBER AND PROGRAMNAME = PREV_PROGRAMNAME AND SUBPROGRAMNAME = PREV_SUBPROGRAMNAME AND PREV_CLIENT_COVERAGE=1) then -1 -- EXCEPT FOR WHEN PREV PREV_CLIENT_COVERAGE WAS ZERO THEN 1.
else case when ((CASENUMBER <> PREV_CASENUMBER OR CLIENT_NUMBER <> PREV_CLIENT_NUMBER OR PROGRAMNAME <> PREV_PROGRAMNAME OR SUBPROGRAMNAME <> PREV_SUBPROGRAMNAME) AND PREV_CLIENT_COVERAGE=1) then-1
else case when ((CASENUMBER <> PREV_CASENUMBER OR CLIENT_NUMBER <> PREV_CLIENT_NUMBER OR PROGRAMNAME <> PREV_PROGRAMNAME OR SUBPROGRAMNAME <> PREV_SUBPROGRAMNAME) AND PREV_CLIENT_COVERAGE=0) then 1
else 88
end
end
end
end CS_COUNT
from WAREHOUSE_DEV.STG_COVERAGE_SUBPROGRAM_FUN_CS
where CASENUMBER = '0042432' and client_number = '0000942256'
ORDER BY CASENUMBER, CLIENT_NUMBER, PROGRAMNAME, SUBPROGRAMNAME, COVERAGE_YEARMONTH, CLIENT_COVERAGE);
PRODUCES RESULTS:
0042432     0042419     0000942256     0001571135     Child Care     Child Care     Child Care     Child Care     201008     1     0     1
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201009     1     1     2
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201010     1     1     3
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201011     1     1     4
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201012     1     1     5
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201101     1     1     6
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201102     1     1     7
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201103     0     1     8
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201104     1     0     0
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201105     1     1     10
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201106     1     1     11
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201107     1     1     12
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201108     1     1     13
0042432     0042432     0000942256     0000942256     Child Care     Child Care     Child Care     Child Care     201109     1     1     14

Answer 1

>
This approach is basically trying to apply a group by while forcing the group by to operate on the data in a specific order(not the group by order).
>
That is NOT a problem statement. That is you attempt at a solution.
You need to tell us what the problem is.
It is YOU that is trying to preach to us by telling us what we can, and cannot consider. No one is trying to preach to you.
Tell us what PROBLEM you are trying to solve; not what solution you want to use.
This is how preaching would read:
Read the FAQ for how to ask a question in the forums.
Use \ tags on the line before and after any code to preserver the formatting.
Don't post two sets of unformatted code and results.
When you do post code and results explain why those results are NOT correct and what results you are trying to produce.
ALWAYS provide your 4 digit Oracle version.
There: how'd I do?