Q? Determining event in DDL Triggers

Question

Hi All,
I've noticed references in the 8i documentation to DDL triggers. In the SQL reference there is mention that you can:
CREATE TRIGGER xyz AFTER DDL
pl/sql block
(or something similar, I typed this my memory)
Which is all great except that it doesn't explain how you find out what caused you to fire.
In a DML trigger, which I am familiar with,
you can do useful things because you have :new and :old values. Is there a :ddl that lists the statement that fired?
Does anyone have sample code of a ddl trigger?
Thanks in advance,
Steven Ensslen

Answer 1

AFTER DDL is just one of the possible clause that can be used. There are may ddl where you can specify the excat ddl action. When you have specified the ddl, ofcorse you know how did the tirgger fired! I am including the documentation section on ddl clause.
Let me know if this solved your problem.
---Doc section---
Specify one or more types of DDL statements that can cause the trigger to fire. You
can create triggers for these events on DATABASE or SCHEMA unless otherwise
noted. You can create BEFORE and AFTER triggers for these events. Oracle fires the
trigger in the existing user transaction. The following values are valid:
ALTER Specify ALTER to fire the trigger whenever an ALTER statement
modifies a database object in the data dictionary.
Restriction: The trigger will not be fired by an ALTER DATABASE
statement.
ANALYZE Specify ANALYZE to fire the trigger whenever Oracle collects or
deletes statistics or validates the structure of a database object.
ASSOCIATE
STATISTICS
Specify ASSOCIATE STATISTICS to fire the trigger whenever
Oracle associates a statistics type with a database object.
AUDIT Specify AUDIT to fire the trigger whenever Oracle tracks the
occurrence of a SQL statement or tracks operations on a schema
object.
COMMENT Specify COMMENT to fire the trigger whenever a comment on a
database object is added to the data dictionary.
CREATE TRIGGER
CREATE Specify CREATE to fire the trigger whenever a CREATE statement
adds a new database object to the data dictionary.
Restriction: The trigger will not be fired by a CREATE DATABASE
or CREATE CONTROLFILE statement.
DISASSOCIATE
STATISTICS
Specify DISASSOCIATE STATISTICS to fire the trigger whenever
Oracle disassociates a statistics type from a database object.
DROP Specify DROP to fire the trigger whenever a DROP statement
removes a database object from the data dictionary.
GRANT Specify GRANT to fire the trigger whenever a user grants system
privileges or roles or object privileges to another user or to a role.
NOAUDIT Specify NOAUDIT to fire the trigger whenever a NOAUDIT
statement instructs Oracle to stop tracking a SQL statement or
operations on a schema object.
RENAME Specify RENAME to fire the trigger whenever a RENAME statement
change the name of a database object.
REVOKE Specify REVOKE to fire the trigger whenever a REVOKE statement
removes system privileges or roles or object privileges from a user
or role.
TRUNCATE Specify TRUNCATE to fire the trigger whenever a TRUNCATE
statement removes the rows from a table or cluster and resets its
storage characteristics.
DDL Specify DDL to fire the trigger whenever any of the preceding DDL
statements is issued.
Restriction: You cannot specify as a triggering event any DDL operation performed
through a PL/SQL procedure.