如何解决如何修复触发器错误？ Oracle 19 Express
我想跟踪某个表的用户活动。 为此，我创建了一个表，我可以在其中插入审计数据：
CREATE TABLE "AUDIT_FINALPAPERS"
( "TBLID" NUMBER,"NAME" VARCHAR2(10),"REMARKS" VARCHAR2(255),"AUDIT_USER" VARCHAR2(50),"AUDIT_DATE" DATE,"AUDIT_ACTION" VARCHAR2(30)
)
CREATE OR REPLACE TRIGGER AUDIT_TBL1
2 -- starts on every update,insert or delete command
3 AFTER INSERT OR DELETE OR UPDATE
4 ON TBL1
5 FOR EACH ROW
6 DECLARE
7 -- variable which declares if update,delete or insert process
8 v_trg_action VARCHAR2 (30);
9 v_user VARCHAR2 (30);
10 BEGIN
11 v_user := SYS_CONTEXT ('APEX$SESSION','APP_USER');
12
13 IF UPDATING
14 THEN
15 -- when update
16 v_trg_action := 'UPDATED.';
17 ELSIF DELETING
18 THEN
19 -- when delete
20 v_trg_action := 'DELETED.';
21 ELSIF INSERTING
22 THEN
23 -- when insert
24 v_trg_action := 'SUBMITTED.'; -- aKtion
25 ELSE
26 -- if something else
27 v_trg_action := NULL;
28 END IF;
29
30 IF v_trg_action IN ('DELETED.','UPDATED.')
31 THEN
32 -- if v_trg_action is DELETE or UPDATE then insert old table values
33 INSERT INTO AUDIT_TBL1 (TBLID,34 NAME,35 REMARKS,36 AUDIT_USER,37 AUDIT_DATE,38 AUDIT_ACTION)
39 VALUES (:OLD.TBLID,40 :OLD.NAME,41 :OLD.REMARKS,42 v_user,43 SYSDATE,44 v_trg_action);
45 ELSE
46 INSERT INTO AUDIT_TBL1 (TBLID,47 NAME,48 REMARKS,49 AUDIT_USER,50 AUDIT_DATE,51 AUDIT_ACTION)
52 VALUES (:NEW.TBLID,53 :NEW.NAME,54 :NEW.REMARKS,55 v_user,56 SYSDATE,57 v_trg_action);
58 END IF;
59 -- about the insert command on the audit table
60 -- for current apex user:SYS_CONTEXT('APEX$SESSION','APP_USER');
61 -- for date: SYSDATE
62 -- for sql command: v_trg_action
63 END AUDIT_TBL1;
64 /
但是我收到错误：PLS-00049：绑定变量错误 这究竟是什么意思，如何解决？
解决方法
看起来像一个错误报告的错误。当我运行您的代码时，它运行良好除了这部分，因为您将变量命名为 v_trg_aKtion（而不是 aCtion）
21 ELSIF INSERTING
22 THEN
23 -- when insert
24 v_trg_action := 'SUBMITTED.'; -- aKtion
看看;触发器已创建。
SQL> CREATE OR REPLACE TRIGGER AUDIT_TBL1
2 -- starts on every update,insert or delete command
3 AFTER INSERT OR DELETE OR UPDATE
4 ON TBL1
5 FOR EACH ROW
6 DECLARE
7 -- variable which declares if update,delete or insert process
8 v_trg_action VARCHAR2 (30);
9 v_user VARCHAR2 (30);
10 BEGIN
11 v_user := SYS_CONTEXT ('APEX$SESSION','APP_USER');
12
13 IF UPDATING
14 THEN
15 -- when update
16 v_trg_action := 'UPDATED.';
17 ELSIF DELETING
18 THEN
19 -- when delete
20 v_trg_action := 'DELETED.';
21 ELSIF INSERTING
22 THEN
23 -- when insert
24 v_trg_action := 'SUBMITTED.'; -- aKtion
25 ELSE
26 -- if something else
27 v_trg_action := NULL;
28 END IF;
29
30 IF v_trg_action IN ('DELETED.','UPDATED.')
31 THEN
32 -- if v_trg_action is DELETE or UPDATE then insert old table values
33 INSERT INTO AUDIT_TBL1 (TBLID,34 NAME,35 REMARKS,36 AUDIT_USER,37 AUDIT_DATE,38 AUDIT_ACTION)
39 VALUES (:OLD.TBLID,40 :OLD.NAME,41 :OLD.REMARKS,42 v_user,43 SYSDATE,44 v_trg_action);
45 ELSE
46 INSERT INTO AUDIT_TBL1 (TBLID,47 NAME,48 REMARKS,49 AUDIT_USER,50 AUDIT_DATE,51 AUDIT_ACTION)
52 VALUES (:NEW.TBLID,53 :NEW.NAME,54 :NEW.REMARKS,55 v_user,56 SYSDATE,57 v_trg_action);
58 END IF;
59 -- about the insert command on the audit table
60 -- for current apex user:SYS_CONTEXT('APEX$SESSION','APP_USER');
61 -- for date: SYSDATE
62 -- for sql command: v_trg_action
63 END AUDIT_TBL1;
64 /
Trigger created.
SQL>
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