extern BI_destroy perl_back_destroy;
extern BI_db_init perl_back_db_init;
+extern BI_db_open perl_back_db_open;
extern BI_db_destroy perl_back_db_destroy;
extern BI_db_config perl_back_db_config;
extern BI_op_bind perl_back_bind;
-extern BI_op_unbind perl_back_unbind;
-
extern BI_op_search perl_back_search;
extern BI_op_compare perl_back_compare;