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SQL Optimizer for SAP ASE 3.8 - Release Notes

Abstract Plan (Optimization Tab)

The Abstract Plan page on the Optimization tab of the Preferences window allows you to include the retrieval of the abstract plan for the SQL statements. This requires Adaptive Server 15 or later.

Dump abstract plan

Specify whether to retrieve the abstract plan for the SQL statement whenever the query plan is retrieved. The abstract plan displays in the SQL Optimizer window. The abstract plan is not saved on the database until you deliberately save it.

When this checkbox is selected, the selected abstract plan icon image\I_AbstractPlanGroup.gif and the abstract plan group name display on the bottom right of the main status bar.

Note: For third-party package applications, you are able to optimize SQL statements without changing the source code by saving the abstract plan.

Group name

Specify the abstract plan group name where the abstract plans are saved. The default group names in Adaptive Server are: ap_stdout and ap_stdin. These groups are usually used by the Database Administrator to enable server-wide abstract plan capturing and retrieving.

ap_stdout is used by default to capture an abstract plan.

ap_stdin is used by default to retrieve the abstract plan associated with a SQL statement during the execution of the SQL statement.

Abstract Plan Manager button

Opens the Abstract Plan Manager window to view, create, and modify abstract plan group.

Check compatibility with Original SQL

Specify whether you want to check the compatibility of the optimized SQL statements with the original SQL. When this option is selected, the AP Compatibility column displays on the SQL Run Time pane of the SQL Optimizer window and in the Batch Run Criteria window.

Note: A SQL statement may have many different "semantically equivalent" SQL statements. Each statement has an abstract plan. Even though SQL statements are "semantically equivalent", the abstract plans may not be compatible with the original SQL statement. When you check this option, the alternative abstract plans that are compatible with your original SQL are identified.


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