Oracle C++ Call Interface Programmer's Guide

Overview of Associative Access
Maximum cache size = optimal_size + optimal_size * max_size_percentage / 100
The default value for the maximum cache size percentage is 10%. The default value
for the optimal cache size is 8MB.
These parameters can be set or retrieved using the following member functions of
the Environment class:
■ void setCacheMaxSize(unsigned int maxSize);
■ unsigned int getCacheMaxSize() const;
■ void setCacheOptSize(unsigned int OptSize);
■ unsigned int getCacheOptSize() const;
See Also:
Overview of Associative Access
You can employ SQL within OCCI to retrieve objects, and to perform DML
operations:
■ Using SQL to Access Objects
Using SQL to Access Objects
■ Chapter 8, "OCCI Classes and Methods" for details.
■ Inserting and Modifying Values
See Also:
■ Appendix A, "OCCI Demonstration Programs" and the code
examples occiobj.typ and occiobj.cpp for an illustration of the
concepts covered in this section
In the previous sections we discussed navigational access, where SQL is used only
to fetch the references of an initial set of objects and then navigate from them to the
other objects. Here we will discuss how to fetch the objects using SQL.
The following example shows how to use the ResultSet::getObject method to
fetch objects through associative access where it gets each object from the table,
addr_tab, using SQL:
string sel_addr_val = "SELECT VALUE(address) FROM ADDR_TAB address";
Object Programming 3-13