I want to do something like
create or replace trigger t1 before ddl on database
begin
insert into table1 values(//the table name on which the ddl will be performed);
end;
so if i create a table named "Hello" than "Hello"(table name) will be inserted in table1
so i don't know how to fetch the table name actually
That's show here in the Database Docs
So you could do something like...
CREATE OR REPLACE TRIGGER ddl_trig
AFTER DDL
ON DATABASE
BEGIN
INSERT INTO loguser.ddl_log
(user_name, ddl_date, ddl_type,
object_type, owner,
object_name)
VALUES
(ora_login_user, SYSDATE, ora_sysevent,
ora_dict_obj_type, ora_dict_obj_owner,
ora_dict_obj_name);
END ddl_trig;
/
BUT, you shouldn't build your own auditing software/code. You should instead use the database's built in auditing system.
See this.
Disclaimer: I work for Oracle and am a product manager on the database team.
Related
I have few databases and all the databases have the same tables (i.e. table names). Now i want to get the DDL of the table with different schema.
Use the dbms_metadata package to get the DDL of any object of the DB.
SELECT
DBMS_METADATA.GET_DDL('<Object type>', '<Object name>', '<object schema>')
FROM
DUAL; -- How to
SELECT
DBMS_METADATA.GET_DDL('TABLE', 'MY_TABLE', 'MY_SCHEMA')
FROM
DUAL; -- In your case use something like this
Also, You can format the output using dbms_metadata.set_transform_param.
See Oracle documentation for more information on it.
Cheers!!
I am trying to create trigger TRIG_USER in Oracle db. Is there a way to control this trigger using the when clause.I want the trigger to activate only if there a entry in the table trigger_switch
I am looking something like this.
CREATE TRIGGER TRIG_USER
AFTER INSERT OR UPDATE OR DELETE ON USER_TABLE
FOR EACH ROW WHEN (IF EXISTS (SELECT 1 FROM trigger_switch))
BEGIN
[...]
END;
In one of my Windows form application in asp .net, I am creating tables on daily basis sharp at 00:00 am with name as "data_YYYY_MM_DD" in Oracle database. A large amount of data exist in each table as after every 5 seconds I am writing some useful data into these.
Now consider all tables of month Oct 2016. All will have name like 'data_2016_10%'. How can I take backup of only these tables (not backup of entire database) and then drop these tables from the database.
You can take logical backup of these tables using data pump. It creates dump file(binary file) which can be imported as per your needs.
Export:Table Mode
A table mode export is specified using the TABLES parameter. In table mode, only a specified set of tables, partitions, and their dependent objects are unloaded.
Example:
expdp hr TABLES=hr.employees VERSION=LATEST DIRECTORY=dpump_dir1 DUMPFILE=emp.dmp NOLOGFILE=YES
Reference:
Data Pump Export
Try like below,
you can schedule it in dbms_scheduler jobs,So that every day it will run and create backup table and drop existing table.Also please add exceptions like table does not exist...if you want
create or replace procedure backup_monthly_table
as
prev_date varchar2(20) := to_char(sysdate-1, 'yyyy-mm-dd');
begin
for i in (select table_name from dba_tables where upper(table_name) like '%'||'"'||prev_date||'_%')
loop
dbms_output.put_line('working');
dbms_output.put_line(i.table_name);
execute immediate 'create table sysman.'||'"'||i.table_name||'_bkp'||'"'||' as select * from sysman.'||'"'||i.table_name||'"';
execute immediate 'drop table sysman.'||'"'||i.table_name||'"';
end loop;
end;
verification output:
select owner,table_name from dba_tables where upper (table_name) like '%2017-%'
SYSMAN 2017-02-01_test1_bkp
SYSMAN 2017-02-01_test2_bkp
SYSMAN 2017-02-01_test3_bkp
SYSMAN 2017-02-01_test4_bkp
I have created the following trigger in oracle-
create or replace TRIGGER TODAY_TD_INSERT AFTER INSERT ON table1
FOR EACH ROW
DECLARE
BEGIN
INSERT INTO table2 (col1
,col2
,col3
)
VALUES (:NEW.,col1
,:NEW.,col2
,:NEW.,col3
);
END;
So if any data insert in table1 the same data is inserting in table 2 also. So my question is do i need commit the data in new table2 ? So far i know we cannot use commit from trigger.
No, you do not. The session that made the change to the table on which the trigger is placed issues the commit (or rollback), and that applies to all changes made by that session.
I am searching for a way, to store only the tables and columns that are added in the database with the one who created it (nachine_name) in a log table.
I tried to add a trigger on sys table user_tab_cols but I cannot do that Why cannot I create triggers on objects owned by SYS?
The system table user_objects will give me the date when a table created, but I want also to know which machine created it. and I also want to track the column creation and modification and log them in a table.
Is that possible ? is there a way for that ?
you can create a database event trigger:
CREATE OR REPLACE TRIGGER log_ddl_event_trg
AFTER DDL
ON DATABASE
DECLARE
v_sql_list ora_name_list_t;
v_sql_txt VARCHAR2(2500);
BEGIN
FOR i in 1..ORA_SQL_TXT(v_sql_list) LOOP
v_sql_txt := v_sql_txt || v_sql_list(i);
EXIT WHEN length(v_sql_txt ) >= 2000;
END LOOP;
...
END;
/
in the Trigger, you can get the executed ddl-statement using the ORA_SQL_TXT() Funktion, and then log it in the table together with the other data (log_date, user etc.).