Performing a Quick Tune

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18.2.6 Performing a Quick Tune

To tune a single SQL statement, the QUICK_TUNE procedure accepts as its input a task_name and a SQL statement. The procedure creates a task and workload and executes this task. There is no difference in the results from using QUICK_TUNE. They are exactly the same as those from using EXECUTE_TASK, but this approach is easier to use when there is only a single SQL statement to be tuned. The syntax is as follows:

DBMS_ADVISOR.QUICK_TUNE (
   advisor_name           IN VARCHAR2,
   task_name              IN VARCHAR2,
   attr1                  IN CLOB,
   attr2                  IN VARCHAR2 := NULL,
   attr3                  IN NUMBER := NULL,
   task_or_template       IN VARCHAR2 := NULL);

The following example shows how to quick tune a single SQL statement:

VARIABLE task_name VARCHAR2(255);
VARIABLE sql_stmt VARCHAR2(4000);
EXECUTE :sql_stmt := ‘SELECT COUNT(*) FROM customers 
                      WHERE cust_state_province =‘‘CA‘‘‘;
EXECUTE :task_name  := ‘MY_QUICKTUNE_TASK‘;
EXECUTE DBMS_ADVISOR.QUICK_TUNE(DBMS_ADVISOR.SQLACCESS_ADVISOR,
              :task_name, :sql_stmt);

See Oracle Database PL/SQL Packages and Types Reference for more information regarding the QUICK_TUNE procedure and its parameters.

http://docs.oracle.com/cd/E11882_01/server.112/e41573/advisor.htm#PFGRF94911

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Performing a Quick Tune

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原文地址：http://www.cnblogs.com/gispf/p/3767447.html