PostgreSQL, Second Edition

Client 1—Connecting to the Server

The libpqxx class library includes a number of public classes you use to interact with the PostgreSQL server. libpqxx also includes a number of private classes you aren't supposed to peek at. All the public components are defined in the pqxx namespace (private classes are defined in a separate namespace). That means you must prefix all libpqxx class names with pqxx:: or include a using namespace pqxx; directive near the top of your source files.

Every libpqxx client includes at least one object of class connection (or a class derived from connection). The connection class, as you might expect, represents a connection to a server. Class connection offers three constructors:

 connection(); connection( const std::string ...