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Dump of file DependentDLLs.exe File Type: EXECUTABLE IMAGE Section contains the following imports: MSVCR80.dll ... further information about MSVCR80.dll skipped for clarity here ... KERNEL32.dll 403000 4066F8 0 0 Import Address Table Import Name Table time date stamp Index of first forwarder reference

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The REMOVE procedure lets you remove a job, and the CHANGE procedure enables you to change the parameters of an existing job. The INTERVAL parameter in the SUBMIT procedure specifies how often your job will run. Refer to the following list to set your interval. Remember that dividing 1 by a number and adding the result to SYSDATE sets the interval.

If you want the job to run every six hours, use the interval SYSDATE + 1/4. If you want the job to run every hour, use the interval SYSDATE + 1/24. If you want the job to run every half hour, use the interval SYSDATE + 1/48. If you want the job to run every 15 minutes, use the interval SYSDATE + 1/96. If you want the job to run every minute, use the interval SYSDATE + 1/1440.

The DBMS_APPLICATION_INFO package enables you to track the names of transactions or modules that the database is executing. When you re performing application tuning, it s often important to know exactly how each module is performing. The DBMS_APPLICATION_INFO package lets you register an application in the database and track its actions. The V$SESSION and the V$SQLAREA dictionary views have the registered application s name and actions. Listing 24-2 shows the contents of the package. Listing 24-2. The DBMS_APPLICATION_INFO Package SQL> DESC DBMS_APPLICATION_INFO Argument Name -----------------------------PROCEDURE READ_CLIENT_INFO CLIENT_INFO PROCEDURE READ_MODULE MODULE_NAME ACTION_NAME PROCEDURE SET_ACTION ACTION_NAME PROCEDURE SET_CLIENT_INFO CLIENT_INFO PROCEDURE SET_MODULE MODULE_NAME ACTION_NAME PROCEDURE SET_SESSION_LONGOPS RINDEX SLNO OP_NAME TARGET CONTEXT SOFAR TOTALWORK TARGET_DESC UNITS SQL> Type --------VARCHAR2 VARCHAR2 VARCHAR2 VARCHAR2 VARCHAR2 VARCHAR2 VARCHAR2 BINARY_INTEGER BINARY_INTEGER VARCHAR2 BINARY_INTEGER BINARY_INTEGER NUMBER NUMBER VARCHAR2 VARCHAR2 In/Out Default -------- -------OUT OUT OUT IN IN IN IN IN/OUT IN/OUT IN IN IN IN IN IN IN

The SET_MODULE procedure is your key DBMS_APPLICATION_INFO procedure. You set a module s name and actions with this procedure. You can incorporate this package in your code so that you can track the performance of the code easily using the V$SESSION and V$SQLAREA dictionary views. Without the DBMS_APPLICATION_INFO package, you ll have a harder time tracking down the exact piece of code in the application that s causing a particular performance problem.

The etime monitor is nearly the same as the cputime monitor. The primary difference is the field that is extracted from the ps output to get the current process age.

Before you can use the DBMS_APPLICATION_INFO package, the owner SYS should grant execution privileges on the package:

Listing 24-3 shows how to use the SET_MODULE procedure. Listing 24-3. Using the SET_MODULE Procedure SQL> CREATE OR REPLACE PROCEDURE delete_employee( 2 name VARCHAR2) 3 AS 4 BEGIN 5 DBMS_APPLICATION_INFO.SET_MODULE( 6 module_name => 'delete_employee', 7 action_name => 'delete from emp'); 8 delete from employees 9 where last_name=name; 10 END; 11* / Procedure created. SQL> User hr can execute this procedure as follows: SQL> EXECUTE delete_employee('Zlotsky'); PL/SQL procedure successfully completed. SQL> You can query the V$SESSION view to see that the DBMS_APPLICATION_INFO.SET_MODULE procedure did indeed do its job: SQL> SELECT username, module, action 2 FROM v$session 3 WHERE username =HR; USERNAME MODULE ACTION ------------------------------ --------------------HR delete_employee delete from emp SQL> You can also query the V$SQLAREA view to see the SQL_TEXT associated with the module delete_employee, as follows: SQL> SELECT sql_text 2 FROM v$sqlarea 3 WHERE module=delete_employee; SQL_TEXT -----------------------------------------------------------DELETE from employees where last_name=:b1 SELECT /*+ all_rows */ COUNT(1) FROM HR.DEPARTMENTS WHERE MANAGER_ID = :1 UPDATE OE.CUSTOMERS SET ACCOUNT_MGR_ID = NULL WHERE ACCOUNT_MGR_ID = :1 SQL>

Import functions table for KERNEL32.dll: 1F Beep ... remainder of list of imported functions from kernel32.dll is skipped for clarity here ... msvcm80.dll ... further information about msvcm80.dll skipped for clarity here ... mscoree.dll 4030A8 4067A0 0 0 Import Address Table Import Name Table time date stamp Index of first forwarder reference

Using the DBMS_CRYPTO package, you can encrypt and decrypt data for several Oracle data types, across different database character sets. This package is superior to the traditional Oracle encryption package, DBMS_OBFUSCATION_TOOLKIT, by providing ease of use and support for a more sophisticated set of cryptographic algorithms. You must be familiar with these security algorithms if you want to use this package for data encryption.