Source code of example programs using ODB API are maintained in ODB API git repository.
ODB API examples
This directory contains examples of usage of ODB API.
C/C++ API
The C API (Application Programming Interface) has been inspired by sqlite3 API. It consists of a set of C functions and constants defined in header file odbql.h. This API is intended to be used in C and C++ programs. It is also a basis of Fortran and Python ODB API interfaces' implementations.
Generally, the ODB API functions that are part of public interface start with odbql_ prefix. All of them have an equivalent in the public interface of sqlite3 that has a sqlite3_ prefix and a simillar syntax (parameters) and semantics.
Similarly, most status and error codes, as well as numerical codes denoting column types, defined in odbql.h with macros prefixed with ODBQL_, have an equivalent macro in sqlite3 that starts with SQLITE_ and has the same meaning and numerical value. However, due to differences between ODB API and sqlite3 it was necessary to add some ODB API specific status codes, at this time these are ODBQL_METADATA_CHANGED and ODBQL_BITFIELD (an ODB specific data type).
See file odbql_c_example.c for complete examples of how to read, write and process data with ODB API SQL engine using ODB API C/C++ interface.
Fortran API
Fortran ODB API is a set of Fortran 95 subroutines and functions wrapping the C API described above. The subroutines and functions are in a module odbql_wrappers, and have the same names as their C equivalents.
See file odbql_fortran_example.f90 for example programs using module odbql_wrappers.
Python API
Python interface of ODB API implements PEP 249 -- Python Database API Specification v2.0.
See odbql_python_example.py for example code using the module.