Oracle C++ Call Interface Programmer's Guide

Executing SQL DDL and DML Statements
or
ConnectionPool->createProxyConnection(const string &name,
string roles[], int numRoles,
Connection::ProxyType proxyType =
Connection::PROXY_DEFAULT);
The following parameters are used in the previous method example:
■ roles[]: The roles array specifies a list of roles to be activated after the proxy
connection is activated for the client
■ Connection::ProxyType proxyType = Connection::PROXY_
DEFAULT: The enumeration Connection::ProxyType lists constants
representing the various ways of achieving proxy authentication. PROXY_
DEFAULT is used to indicate that name represents a database username and is
the only proxy authentication mode currently supported.
Executing SQL DDL and DML Statements
Creating a Statement Handle
SQL is the industry-wide language for working with relational databases. In OCCI
you execute SQL commands by means of the Statement class.
To create a Statement handle, call the createStatement method of the
Connection object, as shown in the following example:
Statement *stmt = conn->createStatement();
Creating a Statement Handle to Execute SQL Commands
Once you have created a Statement handle, execute SQL commands by calling the
execute, executeUpdate, executeArrayUpdate, or executeQuery methods
on the Statement. These methods are used for the following purposes:
■ execute: To execute all nonspecific statement types
■ executeUpdate: To execute DML and DDL statements
■ executeQuery: To execute a query
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