如何使CLOBAGG函數對結果進行排序？

Question

我有這個clobagg功能：

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; 
/

但問題是，我得到的數據不正確的順序。你能幫助我，告訴我如何實現正確的秩序？我需要clobagg函數，因爲listagg和其他可以返回4000字節，在我的情況下，這是不夠的。

---

下面是該查詢：

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; 

我嘗試「活動」列添加到表中以正確的順序。爲了這一刻，我可以添加到表中，但隨機順序。當我通過aktiv.AKTIVITÄT_NR嘗試訂單數據時，我也必須將此字段添加到我的羣組，並且這會破壞我的分組。

Answer 1

您錯過了內部聚合的訂單。您需要在彙總之前訂購。你在外部聚合之前這樣做，而不是內部聚合。