CsvJdbc is a read-only JDBC driver that uses Comma Separated Value (CSV) files or DBF files as database tables. It is ideal for writing data import programs or analyzing log files. The driver enables you to access a directory or a ZIP file containing CSV or DBF files as if it were a database containing tables. As there is no real database management system behind the scenes, not all JDBC functionality is available.
lib4d_sql is a C library that provides the required functions (connect, prepare, execute, etc.) for writing an SQL client for 4D databases. It uses the public 4D SQL protocol, which is supported by 4D products since version 11. It is already used by the PDO_4D Open Source project, and it might be used to provide others drivers for JDBC, ADO, or ActiveRecord.