APQ is an Ada95 thick binding to allow Ada SQL client programs to access PostgreSQL, MySQL and Sybase database systems. The project is now hosted at http://framework.kow.com.br
lib4d_sql is a C library providing the required functions (connect, prepare, execute, ...) to write a SQL client for 4D databases. It uses the public 4D SQL protocol wich is supported by 4D products since... the version 11. It is already used by the PDO_