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The DBA_RSRC_PLANS view contains information on all the resource plans. 11 covers in detail how to use the Database Resource Manager to implement resource plans in your database. The query in Listing 23-12 shows how to use the DBA_RSRC_PLANS view. Listing 23-12. Querying the DBA_RSRC_PLANS View SQL> 2 3 4 5 6 7* SELECT plan, cpu_method, comments, status, mandatory FROM dba_rsrc_plans; COMMENTS -------Plan to give system priority Plan to internally quiesce system Default Plan STATUS --------ACTIVE ACTIVE ACTIVE MANDATORY --------NO YES YES

PLAN CPU_METHOD ------------- --------SYSTEM_PLAN EMPHASIS INTERNAL QUIESCE INTERNAL_PLAN SQL> EMPHASIS EMPHASIS

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When the implicitly dereferenced syntax is used, the compiler automatically generates code for creating and disposing an instance. Such a strict coupling of variable declaration and object creation is not always desired. If you want to provide deterministic disposal for an object that is not instantiated by you, but passed to you by foreign code as a return value of a function or in any other way, the implicitly dereferenced syntax cannot be used. The following expression cannot be compiled: FileStream fs = *GetFile();

A small set of data dictionary views helps you maintain the auditing features of Oracle Database 10g. When you start auditing activity in an Oracle database, a table called sys.aud$, also known as audit_trail, is used to hold the audit information. This is the default location for audit information, although you can choose an operating system file to store the audit details. Let s quickly look at the important audit-related data dictionary tables.

Here are a few examples of subject lines and the actions they would cause to be performed: Subject: getthisfile help: Sends getthisfile usage information back to the sender. Subject: getthisfile /etc/resolv.conf: Mails the /etc/resolv.conf file back to the sender. Subject: getthisfile command ls -l /tmp: Sends the output of ls -l /tmp back to the sender. Subject: getthisfile binary /usr/bin/diff: uuencodes the binary file /usr/bin/diff and mails the text back to the sender for later decoding. uuencode is a utility that encodes a binary file (executable, data, etc.) into simple ASCII. This way the file can be easily sent through e-mail and decoded on the receiving side.

The DBA_AUDIT_OBJECT view holds all the audit records for the objects in the database. The following query traps the audited information on user hr s tables: SQL> 2 3 4 5 6* SELECT username, timestamp, obj_name, action_name FROM DBA_AUDIT_OBJECT WHERE owner='HR'; TIMESTAMP -----------26-Jun-2005 08:39:56 am 26-Jun-2005 08:40:18 am OBJ_NAME -----------EMPLOYEES EMPLOYEES ACTION_NAME -----------SELECT SELECT

The DBA_AUDIT_SESSION view contains information only on the CONNECT and DISCONNECT statements issued in the database.

The DBA_AUDIT_STATEMENT dictionary view captures all audit trail records that involve an ALTER SYSTEM, GRANT, REVOKE, AUDIT, or NOAUDIT statement issued in the database.

You use the DBA_AUDIT_TRAIL view to examine all audit trail entries. The view displays the user s name, the audit auction (SELECT, INSERT, and so on), the time stamp, the privilege used to execute the audited statement, and the SQL statement itself. The DBA_AUDIT_EXISTS view shows the audit trail for AUDIT EXISTS and AUDIT NOT EXISTS.

wo of the fundamental types of operations in any programming language are the comparison and the test. They are the building blocks of conditional statements (if/ then and case) and iteration statements (while). They give you the ability to examine relationships between data items, such as files, variables, strings, and numeric values, and to take action based on the result. You can also carry out actions based on the attributes of a particular item, such as a file s type, whether a variable has been assigned a value, and the return code of a command. The examples in this chapter illustrate various ways to compare items or to check their properties, and use the results. I have used all of these techniques throughout this book, although some are used more frequently than others. Here I want to present a diverse set of examples that demonstrate the many uses of the test shell programming structure.

The new DBA_COMMON_AUDIT_TRAIL view shows all audit trail entries, including standard as well as fine-grained auditing polices. The view also shows all mandatory and SYS audit records. The V$XML_AUDIT_TRAIL dynamic view shows standard, fine-grained, SYS, and mandatory audit records in XML-format files.

The DBA_AUDIT_POLICIES view shows all fine-grained auditing policies in your database. The DBA_AUDIT_POLICY_COLUMNS view shows all fine-grained audit policy columns. The DBA_FGA_AUDIT_TRAIL view displays all audit records for fine-grained auditing. You can see the name of the fine-grained auditing policy as well using this view.