Database Schema Definition in C++

C++ applications use the same eXtremeDB DDL processor as C applications to define the database schema. Please refer to the C Schema Definition page for details.

For C++ applications, the mcocomp -hpp or -cpp option can be specified to cause generation of C++ "wrapper" class implementations in file <db_name>.hpp in addition to the C header and implementation files <db_name>.h and <db_name>.c.

Please refer to the C++ Quick Start page for a brief description of the steps of Database Definition, and the DDL pages for a detailed explanation of the eXtremeDB Data Definition language.

C++ Wrapper Classes

As explained in the C++ Quick Start, the C++ API is a "thin" wrapper around the C API. In fact, the generated C++ implementation file (<db_name>.hpp) defines a namespace <db_name> and a C++ class for each database class defined in the schema file.

C++ SQL Classes

Often the eXtremeDB C++ API is chosen, in preference to the C API, for eXtremeSQL applications. The C++ API provides convenient encapsulation of the low-level C SQL API in the form of class McoSqlEngine. Please refer to the C++ Embedded SQL Quick Start for a brief introduction to the use of McoSqlEngine.