How to trigger database plugin

Question

Hi
I have created a data provider(JDBC) and I have assigned a data instance.I want to know when will this be triggered

Answer 1

thanx a lot.but how to define it for a particular schema.i think it will apply to all >>schemas. No.
http://download-uk.oracle.com/docs/cd/B19306_01/server.102/b14200/statements_7004.htm#i2235611
"Specify SCHEMA to define the trigger on the current schema. The trigger fires whenever any user connected as schema initiates the triggering event."
You can use {schema.}SCHEMA syntax to specify the particular schema explicitly:
SQL> conn scott/tiger
Connected.
SQL> create table test_t (id number);
Table created.
SQL> grant select, insert on test_t to public;
Grant succeeded.
SQL> conn / as sysdba
Connected.
SQL> Create or Replace trigger logon_trig
  2  after logon on SCOTT.SCHEMA
  3  Begin
  4   insert into scott.test_t values(1);
  5   commit;
  6  end;
  7  /
Trigger created.
SQL> conn scott/tiger
Connected.
SQL> select * from test_t;
        ID
         1
SQL> conn user2/user2
Connected.
SQL> select * from scott.test_t;
        ID
         1
[PRE]
Consider the schema name has to be in UPPER CASE.
The same effect is if you create trigger in SCOTT schema:
[PRE]
SQL> conn scott/tiger
Connected.
SQL> truncate table test_t;
Table truncated.
SQL> Create or Replace trigger logon_trig
  2  after logon on schema
  3  Begin
  4   insert into scott.test_t values(1);
  5   commit;
  6  end;
  7  /
Trigger created.
SQL> conn / as sysdba
Connected.
SQL> drop trigger logon_trig;
Trigger dropped.
SQL> conn user2/user2
Connected.
SQL> select * from scott.test_t;
no rows selected
SQL> conn scott/tiger
Connected.
SQL> select * from test_t;
        ID
         1Rgds.