How to make CLOBAGG function ordering the results? - oracle11g

Question

I have this clobagg function:
create or replace type clobagg_type as object(
text clob,
static function ODCIAggregateInitialize(sctx in out clobagg_type
) return number,
member function ODCIAggregateIterate(self in out clobagg_type,
value in clob
) return number,
member function ODCIAggregateTerminate(self in clobagg_type,
returnvalue out clob,
flags in number
) return number,
member function ODCIAggregateMerge(self in out clobagg_type,
ctx2 in clobagg_type
) return number
);
/
create or replace type body clobagg_type is
static function ODCIAggregateInitialize(sctx in out clobagg_type
) return number is
begin
sctx := clobagg_type(null);
return ODCIConst.Success;
end;
member function ODCIAggregateIterate(self in out clobagg_type,
value in clob
) return number is
begin
self.text := self.text || value;
return ODCIConst.Success;
end;
member function ODCIAggregateTerminate(self in clobagg_type,
returnvalue out clob,
flags in number
) return number is
begin
returnValue := self.text;
return ODCIConst.Success;
end;
member function ODCIAggregateMerge(self in out clobagg_type,
ctx2 in clobagg_type
)return number is
begin
self.text := self.text || ctx2.text;
return ODCIConst.Success;
end;
end;
/
create or replace function clobagg(input clob) return clob
deterministic
parallel_enable
aggregate using clobagg_type;
/
But the problem is that I get data not in the right order. Can you help me and tell me how do achieve right order? I need clobagg function because listagg and other can return 4000 bytes and in my case it is not enough.
Here is the query:
CREATE TABLE GO_PRJ_SACHV7.TEST_STEPS1 (
test_case_id NUMBER(9,0),
activity CLOB
);
INSERT INTO GO_PRJ_SACHV7.TEST_STEPS(test_case_id, activity)
select test_case_id, clobagg(activity1)
from (
select
testschrit.testfall_id as test_case_id,
TESTSCHRITT_NR,
CHR(10) || 'h2.' || TESTSCHRITT_NR || ' ' ||
CAST(TESTSCHRITT_BEZEICHNUNG AS varchar(800)) || CHR(10) ||
CAST(TESTSCHRITT_BESCHREIBUNG AS varchar(800)) || CHR(10) ||
CAST(testschrit.TESTSCHRITT_BESCHREIBUNG AS varchar(800)) ||
'||AKTIVITÄT_NR' || '||AKTIVITÄT_KÜRZEL' || '||AKTIVITÄT_BESCHREIBUNG' ||
'||AKTIVITÄT_ERWARTETES_ERGEBNIS||' || CHR(10) ||
clobagg(
' |' || aktiv.AKTIVITÄT_NR || ' |' || aktiv.AKTIVITÄT_KÜRZEL || ' |' ||
aktiv.AKTIVITÄT_BESCHREIBUNG || ' |' ||
aktiv.AKTIVITÄT_ERWARTETES_ERGEBNIS || ' |' || CHR(10)
) as activity1
FROM
GO_PRJ_SACHV7.TESTFALLBESCHREIBUNG tfb,
GO_PRJ_SACHV7.TESTSCHRITTE testschrit,
GO_PRJ_SACHV7.AKTIVITÄTEN aktiv
WHERE testschrit.testfall_id = tfb.testfall_id(+)
AND testschrit.TESTSCHRITT_ID=aktiv.TESTSCHRITT_ID (+)
Group by
testschrit.testfall_id,
testschrit.testschritt_id,
testschrit.TESTSCHRITT_NR,
CAST(TESTSCHRITT_BEZEICHNUNG AS varchar(600)),
CAST(TESTSCHRITT_BESCHREIBUNG AS varchar(600))
order by testschrit.testfall_id, TESTSCHRITT_NR
)
group by test_case_id;
I try to add 'activity' column to the table in the right order. For this moment I can add this to the table but with random order. When I am trying order data by aktiv.AKTIVITÄT_NR I also have to add this field to my group by and this destroy my grouping.

Answer 1

You're missing an order by for the inner aggregate. You need to order before aggregating. You do that before the outer aggregate but not the inner one.