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As discussed in 2, a variable of type Object^ is a reference to a managed object on the GC heap. Apart from a few rare cases, native pointers refer to native memory, not into the managed heap. Therefore, it makes sense that a conversion cannot be done. If a native pointer were a value type, it would be boxed so that an Object^ could refer to a new managed object that contains the native pointer value. Native pointers are not treated like value types, but there is a special managed value type that encapsulates native pointers: System::IntPtr. To pass a pointer to WriteLine, you can wrap it in System::IntPtr, as shown in the following code: Console::WriteLine("pi = {0}", IntPtr(pi)); // this code works Since System::IntPtr is a managed value type, it can be boxed to be passed as an Object^. Just as the IL uses the keyword int32 for System::Int32, the keyword native int is used for the type System::IntPtr.

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Note that when versioned tables are created in a database, the original table is renamed tableName_LT. Oracle also creates a new table called tableName_AUX and a view with an identical name as the original table. When users log in, they are placed, by default, in the LIVE workspace. All other workspaces that exist in the database are children of the LIVE workspace. Whenever you refresh your workspace, you can see the latest changes made in the parent workspace, which also includes any changes merged from other child workspaces. The merging of a workspace with the parent LIVE tablespace makes the changes in the child workspace public. The MERGE statement follows the resolution of any conflicts. The Workspace Manager feature is provided with the Oracle software, but it won t be automatically installed in a database that you create manually. If you use the DBCA to create a new database, and you let Oracle create a seed database as part of the Oracle software installation, the Workspace Manager feature is automatically installed. An easy way to find out whether the Workspace Manager is already installed is to look for the WMSYS user using the DBA_USERS view, since WMSYS owns the Workspace Manager tables. If that user is already there, you can go ahead and use the feature. Otherwise you ll need to install the Oracle Workspace Manager in your database. The easiest way to use the Workspace Manager is by accessing it through OEM. OEM lets you create and manage workspaces, as well as enable and disable table versioning.

his chapter will give you a good understanding of the procedure for correctly installing the Oracle Database 10g server software, and it includes an example of an installation of Oracle Database 10g on a server using the Red Hat Enterprise Linux WS 3 operating system. 20 contains a discussion of installing Oracle on Windows servers. There are some variations in the installation procedure for the different flavors of UNIX, such as Sun s Solaris, Hewlett Packard s HP-UX, IBM s AIX, and so on, but the steps are essentially the same. Several steps need to be performed before and after the installation of the Oracle software, both by you and the Linux/UNIX system administrator, and this chapter explains those steps. The software must be installed according to a sensible plan, and this chapter shows you how to install Oracle by following the well-known Optimal Flexible Architecture (OFA) guidelines. Note that you ll be going through the main features of a generic Oracle installation in this chapter. It s important that you have access to the Oracle installation manuals for your specific operating system before you begin installing the Oracle Database 10g software. The installation manuals are all available on the Oracle Technology Network web site. Of course, if you re configuring Oracle Real Application Clusters (RAC) or some such advanced architecture, you ll need more time to finish the installation. Complex as the Oracle database server software is, the actual time you need to install the software is trivial compared to the time you need to spend to ensure that all the preinstallation steps have been completed correctly. If you follow all the recommended steps, the installation process should work the first time around.

When it comes to the mechanics of the process, installing the Oracle server software is really a simple affair. Installing all the software will probably not take you more than a couple of hours. All the real effort goes into the proper planning of such things as the physical space and memory allocation, and the operating system configuration you need for your Oracle databases to function optimally.

if [ -f $HOME/bin/$ED ] then test "$DEBUG" != "" && echo DEBUG: Cleaning up old ed.script rm $HOME/bin/$ED fi