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SQL Optimizer for SAP ASE 3.9.1 - Release Notes

Parameters Window

The data type and value of parameters are entered using the Parameters window. If parameters are embedded in the SQL statement, the Parameters window displays each time you optimize the SQL statement, execute the Show Plan, Run Result, Run Time, Batch Run functions, or create a temporary table through the User-Defined Temp Table window.

The parameter values that you have previously entered can be saved by selecting the Enable SQL parameter history Preferences setting. If the same parameter is used in a SQL statement again, the value and the data type from the last time it was used is automatically entered for you.

To help identify the data type and value, click Browse to expand the Parameters window. The bottom pane displays displaying object and data information corresponding to the selected objects from the SQL statement. Select the object to browsed using the Objects and Columns drop-down list. If a column is selected (asterisk * selects all columns from the selected object), the corresponding data type is shown.

Click Load Data and highlight the cell with the variable value from the data grid. Then click Use Data & Datatype or double-click the cell to copy the compatible data type and value to the parameter selected at the top of the window.

Click Use Datatype to copy a compatible data type to the parameter selected at the top of the window.

After the data type and value of all the parameters have been selected, click OK.

Notes:

  • The values entered in the Parameters window has a direct effect the on the query plan, run time and run result retrieved and on the resulting SQL alternatives that are generated during the optimization process.
  • You can edit the data using the Button Bar at the bottom of the Parameter window.
  • If the Parameters window displays when you do not have variables in the SQL statement, this may be caused by incorrect spelling of column or table names, having the wrong database or user selected, or the tables or column do not exist in the database.

 

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