Oracle C++ Call Interface Programmer's Guide

See Also:
Developing an OCCI Object Application
Developing an OCCI Object Application
This section discusses the steps involved in developing a basic OCCI object
application.
Basic Object Program Structure
■ Chapter 7, "How to Use the Object Type Translator Utility" for
more information about the OTT utility
The basic structure of an OCCI application that uses objects is similar to a relational
OCCI application, the difference being object functionality. The steps involved in an
OCCI object program include:
1. Initialize the Environment. Initialize the OCCI programming environment in
object mode.
Your application will most likely need to include C++ class representations of
database objects in a header file. You can create these classes by using the Object
Type Translator (OTT) utility, as described in Chapter 7, "How to Use the Object
Type Translator Utility".
2. Establish a Connection. Use the environment handle to establish a connection to
the database server.
3. Prepare a SQL statement. This is a local (client-side) step, which may include
binding placeholders. In an object-relational application, this SQL statement
should return a reference (REF) to an object.
4. Access the object.
a. Associate the prepared statement with a database server, and execute the
statement.
b. By using navigational access, retrieve an object reference (REF) from the
database server and pin the object. You can then perform some or all of the
following:
* Manipulate the attributes of an object and mark it as dirty (modified)
* Follow a reference to another object or series of objects
* Access type and attribute information
* Navigate a complex object retrieval graph
Object Programming 3-7