View Open Optimized SQL Details
View Open Optimized SQL Details Window
The Open Optimized SQL Details window displays information about the optimization process and the resulting query plans. The Open Optimized SQL Details window displays after the SQL statements are reloaded into the SQL Optimizer window. You can review the Open Optimized SQL Details window once it has been closed by selecting View | Show Open Optimized SQL Details when the SQL Optimizer window is active.
Note: The Optimized SQL Details cannot be viewed if the SQL Editor pane is the active pane in the SQL Optimizer window.
The Open Optimized SQL Details window has the following tabs:
Summary Tab
The Summary tab provides detailed information about the optimization of the SQL statements and changes that may have occurred in the query plans of the original SQL or alternative SQL statements since the optimization process was done.
Optimization Information
The optimization information includes the date and time of the optimization, how many alternatives were created, the connection information, and the optimization settings from the Preferences window at the time of this optimization.
Last Saved Query Plan Information
The query plan information includes the date and time of the SQL statements that were saved, how many alternatives were created, the connection information, and if any of the query plans have changed since the time they were saved.
During the process of opening the Save Optimized SQL, the current query plan is retrieved and compared to the saved query plan. The changes are noted in the Current column as follows:
| Current column item | Description |
|
Cost only |
The only change to the query plan was a change in the Estimated I/O cost. |
|
Structure and cost |
Both the structure and Estimated I/O cost of the query plan changed. |
|
Structure only |
The structure of the query plan changed but the Estimated I/O cost remained the same. |
|
No |
The current query plan is the same as the query plan that was saved with the SQL statement. |
Refresh Plan Button
The Refresh Plan button enables you to replace old query plans with the current plans. This process retrieves the current query plans, deletes any SQL statement that is now invalid, removes any run time information. You can select to eliminate SQL alternatives that now have duplicate query plans. After the query plans are refreshed, the Refresh Plan Details window displays.
Note: The Refresh Plan button is only enabled when there is a difference between the current query plan and the saved plan.
Changes Tab
The Changes tab displays the text of the SQL statement in the top pane. The bottom pane displays the saved query plan and the current query plan side by side for comparison.
User-Defined Temp Table Tab
The User-Defined Temp Table tab is available only if the SQL statements use a temporary table. When the Optimized SQL statements were saved, the DDL for creating the temporary table is saved with them and when the SQL statements are reloaded the DDL displays.
Refresh Plan Details Window
The Refresh Plan Details window tells how many SQL statements were refreshed and it any of the SQL alternatives were eliminated due to duplicate query plans or invalid SQL statements. It also displays the SQL for Cursor setting that was used and tells whether a temporary table was used.
This window is only available after the saved query plans were replaced with the current query plans by clicking Refresh Plan on the Open Optimized SQL Details window.
Batch Run
Retrieve Run Time for a Group of SQL
The Batch Run function is used to retrieve the run time of a group of optimized SQL statements.
To start the Batch Run
Click 
The Batch Run Criteria window is divided into the following tabs:
Select your batch run criteria and click OK. The Batch Run window displays the run time criteria and the run time of the SQL statements as it is retrieved. SQL | Stop Current and SQL | Abort Batch Run functions are available to terminate the currently running SQL statement and stop the batch run process. Each selected SQL statement is execute sequentially retrieving the run time unless terminated.
To terminate the currently running of the SQL statement
Select SQL | Stop Current.
To terminate the batch run process
Click 
Note: For UPDATE, INSERT, and DELETE SQL statements, while retrieving the run time and run result you may encounter the following Adaptive Server error message:
allocate space for object 'syslogs' in database 'sqlexp' because the 'logsegment' segment is full. If you ran out of space in syslogs, dump the transaction log. Otherwise, use ALTER DATABASE or sp_extendsegment to increase the size of the segment
This is due to the lack of space in system table (syslogs) in which all changes to the database are recorded. Empty the transaction log in the database and re-execute. Use the following command in the SQL Workshop module:
DUMP TRANSACTION database_name WITH TRUNCATE_ONLY
go