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A Type 4 (100% java) JDBC Driver for the Fourth Dimension database. The project is largely made obsolete by the official 4D JDBC driver, which can be obtained from: http://www.4d.com/products/4djdbc.html.
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_