I am trying to create a trigger in oracle like blow:
CREATE OR REPLACE TRIGGER TRIGGER_VC_PART_LIST
BEFORE INSERT ON VC_PART_LIST FOR EACH ROW
BEGIN
SELECT VC_PART_LIST_SEQ.NEWTVAL INTO :new.SEQ_ID FROM dual;
END;
/
anyone can help me?Thx.
In sequence to fetch the next value use NEXTVAL . Below is the correct syntax
CREATE OR REPLACE TRIGGER TRIGGER_VC_PART_LIST
BEFORE INSERT
ON VC_PART_LIST
FOR EACH ROW
BEGIN
SELECT VC_PART_LIST_SEQ.NEXTVAL INTO :new.SEQ_ID FROM DUAL;
END;
There are few issues in your code.
1) VC_PART_LIST_SEQ.NEWTVAL there is nothing called NEWTVAL in Oracle. It should be Nextval.
2) There is no need for a SQL statement.
See demo:
Trigger:
CREATE OR REPLACE TRIGGER TRIGGER_VC_PART_LIST
BEFORE INSERT
ON VC_PART_LIST
FOR EACH ROW
BEGIN
:new.SEQ_ID := VC_PART_LIST_SEQ.NEXTVAL;
END;
/
Table:
create table VC_PART_LIST (SEQ_ID number,
VC_VTC varchar2(20), PART_NO varchar2(20), CONSUME_QTY varchar2(20));
Sequence
create sequence VC_PART_LIST_SEQ start with 1 increment by 1;
Insertion:
INSERT INTO VC_PART_LIST (VC_VTC, PART_NO, CONSUME_QTY)
VALUES ('6175SMFGD132000D', 'SC25R136', '11');
Commit;
Selection:
SQL> select * from VC_PART_LIST;
SEQ_ID VC_VTC PART_NO CONSUME_QTY
---------- -------------------- -------------------- --------------------
1 6175SMFGD132000D SC25R136 11
Related
I need to create a trigger that can insert in an audit table which DML command- insert update delete has been used on a base table plus with machine name.
Please guide me with this.
Let me show you an example:
1.A table my_test where I will make the dml operations
2.An audit table to record the operations
3.A Trigger to capture the values interested.
SQL> create table my_test ( c1 number, c2 number );
Table created.
SQL> create table audit_my_test ( id_timestamp timestamp,
session_id number,
username varchar2(30),
machine varchar2(50),
sql_text varchar2(400),
operation_type varchar2(20)
);
Table created.
SQL> create or replace trigger my_trg_my_test after insert or delete or update on my_test
referencing new as new old as old
for each row
declare
v_sql varchar2(400);
v_usr varchar2(40);
v_ope varchar2(20);
v_ter varchar2(50);
v_sid number;
begin
select sys_context('USERENV','SESSION_USER'),
sys_context('USERENV','CURRENT_SQL'),
sys_context('USERENV','SID'),
sys_context('USERENV','HOST')
into
v_usr,
v_sql,
v_sid,
v_ter
from dual;
IF INSERTING THEN
v_ope := 'Insert';
ELSIF UPDATING THEN
v_ope := 'Update';
ELSIF DELETING THEN
v_ope := 'Delete';
END IF;
insert into audit_my_test values ( systimestamp , v_sid, v_usr, v_ter, v_sql, v_ope );
end;
/
Trigger created.
SQL> show err
No errors
Now let's make some DML operations over the table
SQL> insert into my_test values ( 1 , 1) ;
1 row created.
SQL> insert into my_test values ( 2 , 2) ;
1 row created.
SQL> commit;
Commit complete.
Verify the audit table
ID_TIMESTAMP SESSION_ID USERNAME MACHINE
--------------------------------------------------------------------------- ---------- ------------------------------ ------------------------------
SQL_TEXT
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
OPERATION_
----------
24-JUL-20 01.01.25.567641 PM 328 SYS scglvdoracd0006.scger.dev.corp
Insert
24-JUL-20 01.01.45.514662 PM 328 SYS scglvdoracd0006.scger.dev.corp
Insert
ID_TIMESTAMP SESSION_ID USERNAME MACHINE
--------------------------------------------------------------------------- ---------- ------------------------------ ------------------------------
SQL_TEXT
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
OPERATION_
----------
You can read all the attributes from sys_context here:
https://docs.oracle.com/cd/B19306_01/server.102/b14200/functions165.htm
The problem with this solution: You will never get the SQL responsible for the operation. CURRENT_SQL in SYS_CONTEXT only works inside a procedure and when it is invoked in a Fine Grain Access (FGA) policy as a handler.
If you need the SQL responsible for the operation, you either construct a FGA policy and a handler, or you use AUDIT which is much better in this specific case.
I am trying to insert below details in two table. but it shows error. where i am wrong?
create or replace PROCEDURE ADD_customer_order(
customer_id in varchar, Shipping_id_arg in number,
order_date_arg in date, Total_price_arg in decimal,
inventory_id_arg in number, order_quantity_arg in number)
AS
BEGIN
INSERT INTO customer_order (customer_id,Shipping_id,Order_date,total_price) VALUES(customer_id_arg,Shipping_id_arg,order_date_arg, total_price_arg);
insert into order_details (inventory_id,order_quantity) values(scope_identity(),inventory_id_arg,order_quantity_arg);
END;
It helps if you format it nicely.
create or replace procedure add_customer_order(
customer_id in varchar2, shipping_id_arg in number,
order_date_arg in date , total_price_arg in decimal,
inventory_id_arg in number , order_quantity_arg in number)
as
begin
insert into customer_order
(customer_id , shipping_id , order_date , total_price)
values
(customer_id_arg, shipping_id_arg, order_date_arg, total_price_arg);
insert into order_details
( inventory_id , order_quantity)
values
(scope_identity(), inventory_id_arg, order_quantity_arg);
end;
Doing so, you easily note that the second INSERT is invalid, as you're inserting 3 values into 2 columns:
insert into order_details
( inventory_id , order_quantity)
values
(scope_identity(), inventory_id_arg, order_quantity_arg);
Either remove scope_identity() (what is it?), or include additional column into the column list you're inserting into.
After reading your comment, it seems that returning clause might help. See the following example (somewhat simpler than yours; didn't feel like typing that much). Trigger is used to auto-increment ORDER_ID column. in CUSTOMER_ORDER table (I'm on 11g XE; don't have identity columns here).
SQL> create table customer_order (order_id number, customer_id number);
Table created.
SQL> create table order_details (order_id number, inventory_id number);
Table created.
SQL> create sequence seqo;
Sequence created.
SQL> create or replace trigger trg_co
2 before insert on customer_order
3 for each row
4 begin
5 :new.order_id := seqo.nextval;
6 end;
7 /
Trigger created.
Procedure: note local variable declared in line #4 and returning clause in line #7:
SQL> create or replace procedure p_test
2 (par_customer_id in number, par_inventory_id in number)
3 is
4 l_order_id customer_order.order_id%type;
5 begin
6 insert into customer_order (customer_id) values (par_customer_id)
7 returning order_id into l_order_id;
8
9 insert into order_details (order_id, inventory_id)
10 values (l_order_id, par_inventory_id);
11 end;
12 /
Procedure created.
Testing:
SQL> exec p_test(100, 200);
PL/SQL procedure successfully completed.
SQL> exec p_test (235, 2230);
PL/SQL procedure successfully completed.
SQL> select * From customer_order;
ORDER_ID CUSTOMER_ID
---------- -----------
1 100
2 235
SQL> select * From order_details;
ORDER_ID INVENTORY_ID
---------- ------------
1 200
2 2230
SQL>
The same ORDER_ID value is used in both tables.
I am trying to create a trigger that runs when I insert in table 'cuenta' and make an insert in table 'cuenta_log', one of the values of this insert is gotten by accept input.
create or replace trigger trigger_new_account
AFTER INSERT ON cuenta FOR EACH ROW
accept vstring prompt "Please enter your name: ";
declare v_line varchar2(50);
begin
v_line:= 'Hello '||'&vstring';
insert into cuentas_log (fecha,cuenta,cliente)
values (now(),:new.idcuenta,v_line);
end;
cuenta_log structure is like that:
cuenta_log
("FECHA" DATE DEFAULT (sysdate),
"CUENTA" NUMBER(38,0),
"CLIENTE" VARCHAR2(50 BYTE)
)
Trigger fires on certain event; yours, after insert into table named cuenta. It doesn't work interactively with end users. You can't expect it to prompt anyone to enter anything. Besides, accept is a SQL*Plus command, it won't work in PL/SQL.
So, here's what you might have done: sample tables first:
SQL> create table cuenta (fecha date, cuenta number);
Table created.
SQL> create table cuenta_log (fecha date, cuenta number, cliente varchar2(30));
Table created.
Trigger:
SQL> create or replace trigger trigger_new_account
2 after insert on cuenta
3 for each row
4 begin
5 insert into cuenta_log(fecha, cuenta, cliente)
6 values
7 (sysdate, :new.cuenta, 'Hello ' || user);
8 end;
9 /
Trigger created.
Testing:
SQL> insert into cuenta (fecha, cuenta) values (sysdate, 100);
1 row created.
SQL> select * From cuenta;
FECHA CUENTA
------------------- ----------
11.05.2020 12:31:17 100
SQL> select * From cuenta_log;
FECHA CUENTA CLIENTE
------------------- ---------- ------------------------------
11.05.2020 12:31:17 100 Hello SCOTT
SQL>
How to add an extra column (say column_2) in the below INTO section of my code along with my Column_1. I assume we can do that by adding comma (,) and just add column_2 (like this INTO :new.Column_1, new.column_2). I'm missing something?
create or replace trigger trigger_name
BEFORE INSERT
ON table_name
FOR EACH ROW
BEGIN
SELECT SEQUENCE_NUMBER.NEXTVAL
INTO :new.Column_1
FROM dual;
END;
It is easy to confirm whether you are right (or wrong). I hope you got the answer during the past 6 hours. If not, here's an example:
SQL> create table test
2 (id number,
3 datum date);
Table created.
SQL> create sequence seq_test;
Sequence created.
SQL> create or replace trigger trg_bi_test
2 before insert on test
3 for each row
4 begin
5 select seq_test.nextval, sysdate
6 into :new.id, :new.datum
7 from dual;
8 end;
9 /
Trigger created.
SQL> insert into test (id) values (-1);
1 row created.
SQL> select * From test;
ID DATUM
---------- -------------------
1 21.06.2019 21:54:08
SQL>
I am using the following TRIGGER to Insert in my TEST Table:
create or replace
TRIGGER TRG_CYCLE
BEFORE INSERT ON TEST_CYCLE
FOR EACH ROW
BEGIN
IF :NEW.LOGID IS NULL
THEN SELECT SEQ_CYCLE.nextval INTO :NEW.LOGID from dual;
END IF;
END;
SEQ_CYCLE is the Sequence. Now I have to use the CYCLE option in order to start with 1 after the MAX_VALUE is reached. Since I don't want duplicate LOGIDs I want to do an UPDATE if the LOGID exists, if not an INSERT. Can I do this inside the Trigger?
If I understand well, you may need an INSTEAD OF trigger; to build such a trigger you need to create a VIEW over your table and build the trigger on this view.
For example, say you have:
create sequence SEQ_CYCLE maxValue 3 cycle nocache;
create table TEST_CYCLE ( logId number, someColumn varchar2(20));
You can create a view and a trigger over the view:
create or replace view v_test_cycle as select * from test_cycle;
create or replace trigger trgCycle
instead of insert on v_test_cycle
for each row
declare
vCheck number;
vSeqVal number := SEQ_CYCLE.nextVal;
begin
select count(*)
into vCheck
from v_test_cycle
where logId = vSeqVal;
--
if vCheck = 0 then
insert into test_cycle(logId, someColumn) values ( vSeqVal, :NEW.someColumn);
else
update test_cycle
set someColumn = :NEW.someColumn
where logId = vSeqVal;
end if;
end;
If you do the INSERTs on the view, this is what you get:
SQL> select * from test_cycle;
no rows selected
SQL> insert into v_test_cycle(someColumn) values('some value 1');
1 row created.
SQL> insert into v_test_cycle(someColumn) values('some value 2');
1 row created.
SQL> insert into v_test_cycle(someColumn) values('some value 3');
1 row created.
SQL> insert into v_test_cycle(someColumn) values('some value 4');
1 row created.
SQL> insert into v_test_cycle(someColumn) values('some value 5');
1 row created.
SQL> select * from test_cycle;
LOGID SOMECOLUMN
---------- --------------------
1 some value 4
2 some value 5
3 some value 3
SQL>