Question

以下是我用来创建表格，序列和触发器的代码

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

当我执行代码时，我得到以下输出

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

是什么让我的触发器无效？

Answer 1

警告：执行完成后警告TRIGGER CDR.ExtDL_JobStatus_SeqTrg已编译。

这是您的触发器编译失败的地方。

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

问题是因为您在代码中使用了 ExtDL_JobStatus_SeqTrg ，并且您创建的序列是 ExtDL_JobStatus_Seq 。

另外，如果您尝试运行这样的脚本来创建（编译）对象，我建议您在每个触发器/过程/函数creatin语句之后添加以下子句。

SHOW ERRORS;

如果你的陈述出现了，那就不会产生任何错误。如果有任何错误，您将获得错误的详细描述，而不必再次执行脚本。

Answer 2

这是一个简单的拼写错误：您的序列称为ExtDL_JobStatus_Seq，但在您的触发器中，您引用了ExtDL_JobStatus_SeqTrg.nextval。

为了将来参考，最好在每次调用PL / SQL（触发器，过程等）的调用之后包含一个在脚本中显示错误的调用。像这样：

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

顺便说一句，匿名区块中存在相同的拼写错误，导致该序列失败。

Answer 3

除了前面提到的所有内容之外，还有两个错误/错误：

尝试删除触发器的匿名PL / SQL块实际上是DROP SEQUENCE。
insert语句尝试将字符串插入ShortName和Description列，这两列都定义为NUMBER（38,0）。

触发器无效，重新验证失败

3 个答案: