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The previous step created the SQL workload. Using this workload, the SQL Access Advisor will recommend the necessary materialized views. Log into the OEM Database Control with SYSDBA privileges, and then follow these steps to use the SQL Access Advisor:

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1 Go the OEM Home Page Advisor Central (under the Related Links section) SQL Access Advisor 2 The Initial Options page will be displayed You can choose between the following: Default options: Your task will use the Oracle recommended options Inherit options: Your task will inherit the options from the selected task or template For our example, select the Use Default Options choice and click Next 3 The Workload Source page is displayed In this page, you must select one of the following as the source for your SQL workload: Current and Recent SQL Activity Import Workload from SQL Repository User-Defined Workload; Import SQL from a Table or View Create a Hypothetical Workload from the Following Schemas and Tables You ve already executed the three SQL statements you want to use as your workload, so select the Current and Recent SQL Activity option 4.

Click on Filter Options, to fine-tune the scope of the SQL workload Select Filter Workload under Filter Options Under the USERS section, select the option that states Include Only SQL Statements Executed by These Users Enter SH in the Users field 5 The Recommendation Options page is displayed There are two sections: Recommendation Types and Advisor Mode In the Recommendation Types section, you must select one of the following: Indexes Materialized Views Both Indexes and Materialized Views Evaluation Only Since our goal is to create materialized views, select the second option In the Advisor Mode section, choose one of the following two modes for the SQL Access Advisor: Limited: This mode is quicker and only processes statements with the highest cost Comprehensive: This mode takes longer to finish, but it performs an exhaustive analysis.

Sometimes application owners may need root access on a system, such as when applications that are owned and managed by someone other than the administrator need to run as root because of their design (or need to be modified by the root user). There are obvious security implications when root access permissions are given to ordinary users, so you have to be very selective about extending root access.

The Comprehensive mode is very resource-intensive, so you may not want to run it during the day in a production database Select the Limited mode option 6 The Schedule page is displayed This page lets you run the analysis immediately or schedule it for a later time You can also enter a task name for your SQL Access Advisor job in the Task Name box at the top of the page Go all the way to the bottom of the page and select Immediately under the Start options Click Next 7 The Review page appears next, and you can confirm all your choices before the Advisor starts its run (see Figure 5-2)..

PublicKeyToken: The fourth part of an assembly name is called PublicKeyToken It can be either null or a 64-bit hexadecimal number In the preceding sample output, the PublicKeyToken for mscorlibdll is b77a5c561934e089, whereas the PublicKeyToken for DumpAssemblyInfo is null Assembly names with PublicKeyToken != null are called strong names To get a strong name, public-key cryptography is used Every developer who wants to create assemblies with a strong name can generate a unique pair of a public and a private key The PublicKeyToken is a hash code of the public key It is used to uniquely identify the developer The private key is used to sign the assembly The public key is burned into the assembly s manifest so that the signature can be verified when the assembly is loaded This provides tamper detection.

Figure 5-2. The SQL Access Advisor s review page 8. You ll see the Advisor Central page next, with a confirmation note saying that your SQL Access Advisor job was created successfully.

queue. The DBMS_AQADM package lets you subscribe to the alert queue, set thresholds, and display alert notifications using various procedures. The DBMS_AQ package lets you manage alert notifications. See the Oracle documentation for more details.