觸發無效，未能再驗證

Question

這裏是我用它來創建一個表，序列和觸發

DROP TABLE CDR.ExtDL_JobStatus; 

-- 
-- TABLE: CDR.ExtDL_JobStatus 
-- 

CREATE TABLE CDR.ExtDL_JobStatus(
    Id    NUMBER(38, 0) NOT NULL, 
    ShortName  NUMBER(38, 0) NOT NULL, 
    Description NUMBER(38, 0) NOT NULL, 
    CONSTRAINT PK_ExtDL_JobStatus PRIMARY KEY (Id) 
) 
; 



Declare NumOfSequences NUMBER :=0; 
Begin 
    Select COUNT(*) 
    INTO NumOfSequences 
    FROM All_Sequences 
    WHERE 1=1 
    And upper (Sequence_Owner) = upper ('CDR') 
    And upper (Sequence_Name) = upper ('ExtDL_JobStatus_Seq'); 
    If NumOfSequences > 0 Then 
    Execute IMMEDIATE 'DROP SEQUENCE CDR.ExtDL_JobStatus_Seq'; 
    End If; 
End; 
/
CREATE SEQUENCE CDR.ExtDL_JobStatus_Seq 
    INCREMENT BY 1 
    START WITH 1 
    NOMAXVALUE 
    NOMINVALUE 
; 
/

Declare NumOfTriggers NUMBER :=0; 
Begin 
    SELECT COUNT(*) 
    INTO NumOfTriggers 
    FROM All_Triggers 
    WHERE 1=1 
    And upper (Owner) = upper ('CDR') 
    And upper (Trigger_Name) = upper ('ExtDL_JobStatus_SeqTrg'); 
    If NumOfTriggers > 0 Then 
    Execute IMMEDIATE 'DROP SEQUENCE CDR.ExtDL_JobStatus_SeqTrg'; 
    End If; 
End; 
/
CREATE TRIGGER CDR.ExtDL_JobStatus_SeqTrg 
BEFORE INSERT 
ON CDR.ExtDL_JobStatus 
    FOR EACH ROW 
    WHEN (new.Id IS NULL) 
    BEGIN 
     SELECT ExtDL_JobStatus_SeqTrg.nextval into :new.Id from dual; 
    END; 


/
INSERT INTO ExtDL_JobStatus (Id, ShortName, Description) Values (0, 'Success', 'Fail') 
/
SELECT * FROM ExtDL_JobStatus 

當我執行的代碼，我得到下面的輸出代碼

DROP TABLE CDR.ExtDL_JobStatus succeeded. 
CREATE TABLE succeeded. 
anonymous block completed 
CREATE SEQUENCE succeeded. 
anonymous block completed 
Warning: execution completed with warning 
TRIGGER CDR.ExtDL_JobStatus_SeqTrg Compiled. 

Error starting at line 62 in command: 
INSERT INTO ExtDL_JobStatus (Id, ShortName, Description) Values (0, 'Success', 'Fail') 
Error at Command Line:62 Column:12 
Error report: 
SQL Error: ORA-04098: trigger 'CDR.EXTDL_JOBSTATUS_SEQTRG' is invalid and failed re-validation 
04098. 00000 - "trigger '%s.%s' is invalid and failed re-validation" 
*Cause: A trigger was attempted to be retrieved for execution and was 
      found to be invalid. This also means that compilation/authorization 
      failed for the trigger. 
*Action: Options are to resolve the compilation/authorization errors, 
      disable the trigger, or drop the trigger. 
ID      SHORTNAME    DESCRIPTION    
---------------------- ---------------------- ---------------------- 

0 rows selected 

是什麼讓我的觸發器失效？

Answer 1

警告：執行與 警告TRIGGER CDR.ExtDL_JobStatus_SeqTrg編譯完成。

這是你的觸發器編譯失敗。

sql> CREATE TRIGGER ExtDL_JobStatus_SeqTrg 
    2 BEFORE INSERT 
    3 ON ExtDL_JobStatus 
    4  FOR EACH ROW 
    5  WHEN (new.Id IS NULL) 
    6  BEGIN 
    7   SELECT ExtDL_JobStatus_SeqTrg.nextval into :new.Id from dual; 
    8  END; 
    9/

Warning: Trigger created with compilation errors. 

sql> show errors; 
Errors for TRIGGER EXTDL_JOBSTATUS_SEQTRG: 

LINE/COL ERROR 
-------- ----------------------------------------------------------------- 
2/9  PL/SQL: SQL Statement ignored 
2/16  PL/SQL: ORA-02289: sequence does not exist 

的問題是，因爲使用的是ExtDL_JobStatus_SeqTrg在你的代碼，你創建的序列ExtDL_JobStatus_Seq。

另外，如果你想運行一個這樣的腳本來創建（編譯）的對象，我會建議你每次觸發/過程/函數肌酸語句後添加下列條款。

SHOW ERRORS; 

如果你的發言succceds，這將只是產生任何錯誤。如果有任何錯誤，您將有錯誤的詳細描述，而不必再次執行腳本。

Answer 2

這是一個簡單的錯字：您的順序被稱爲ExtDL_JobStatus_Seq，但在您的觸發器中，您可以參考ExtDL_JobStatus_SeqTrg.nextval。

以供將來參考這是一個好主意，包括調用每個編譯PL/SQL（觸發器，程序等），來電後顯示腳本錯誤。像這樣：

CREATE TRIGGER CDR.ExtDL_JobStatus_SeqTrg 
BEFORE INSERT 
ON CDR.ExtDL_JobStatus 
    FOR EACH ROW 
    WHEN (new.Id IS NULL) 
    BEGIN 
     SELECT ExtDL_JobStatus_SeqTrg.nextval into :new.Id from dual; 
    END; 
/

show errors 

順便說一句，在匿名塊中有相同的錯字，試圖刪除序列。

Answer 3

除了前面提到的一切，還有另外兩個錯別字/錯誤：

1. ，試圖刪除觸發器匿名PL/SQL塊實際上說的DROP SEQUENCE。
2. 的插入語句試圖插入字符的字符串進SHORTNAME和說明列，這兩者都定義爲NUMBER（38，0）。