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Worked Example of Replacing the Current Existing Plan with a Different Plan Using a SPM SQL Plan Baseline (Doc ID 1580762.1)

Last updated on SEPTEMBER 13, 2022

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.1 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.

Goal

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In a situation where you want to use a different access path for a query but you can not modify the application SQL, you can enforce the plan by using SQL Plan Management (SPM) baselines. This article provides a worked example of the steps required to achieve this.

Solution

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In this Document
Goal
Solution
 Worked Example:
 Setup tables for the example:
 Load data into the tables
 Execute the Original SQL
 Get the SQL_ID for the Original SQL
 Load the SQL to baseline
 Check to see the SQL is in baseline
 Disable the SQL in baseline
 Check to see that the baseline is disabled
 Run the SQL with the target access path
 Identify the SQL using the target plan
 Associate the target plan with the Query
 Check baseline
 Test that the original SQL runs serially

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