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Figure 3 9. SQL AzureFirewall Settings 3. Click the Add Rule button, and when the popup appears, enter MyComputer into the Name text box. Notice that the popup displays your IP address, which you should now copy and paste into the IP Range text boxes, as shown in Figure 3 10. Use Singletons when you want to share data or resources between clients. But always keep in mind Tip that more than one client might access the same object at any given time, so you have to write the serverside code in a thread-safe way. APPENDIX B BA SH COMMA ND INDEX
Note Strictly speaking, it is possible to avoid the need to have copies of the interface and parameter objects This example started life as a production issue, before being stripped back to a simple test case. The original code was running under 8i, and displaying an odd performance problem, so I re-created the data on a 9i database to see if the problem would go away and it did. I then discovered that the problem had gone away because CPU costing allowed the optimizer in 9i to do something that the 8i optimizer could not do.
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