int main(int argc, char **argv) { dbDriver *driver; dbHandle handle; int stat; parse_command_line(argc, argv); driver = db_start_driver(parms.driver); if (driver == NULL) G_fatal_error(_("Unable to start driver <%s>"), parms.driver); db_init_handle(&handle); db_set_handle(&handle, parms.database, NULL); stat = db_create_database(driver, &handle); db_shutdown_driver(driver); exit(stat == DB_OK ? EXIT_SUCCESS : EXIT_FAILURE); }
/***************************************************************************************************************************** open Prepares the database for use. An existing database is opened or otherwise an empty database is created. If the database is openend a table _META with meta info is loaded into a dictionary _META. The dictionary key is the code of the data element. A data element is either a tabel (dimension/event) or a field (characteristic/property). The value of the dictionary is the MET_INFO structure. This structure contains meta data about the data element. If the database is created an empty table _META is created. The function calls virtual functions, db_, which must be overriden by a derived class for a specific database implementation. ******************************************************************************************************************************/ void ARAS::open(DBInfo dbInfo) { if (isopen) return; // store db information this->dbInfo = dbInfo; // open or create database // performs the database specific initialization code, the specific information to be used is stored in the struct DBInfo. db_init_database(); // performs the database specific code to check whether a database alreay exists and open it. if (db_open_database()) { // read _META table from database into dictionary _META TABLE values; db_select_table("_META", {"CODE","INFO"}, values); for (auto i : values) _META.insert(std::pair<std::string, META_INFO>(i[0], META_INFO(i[1]))); } else { // performs the database specific code to create a new database based on DBInfo. db_create_database(); // create table _META: define the columns META_INFO imeta(data_type::DIM, 0, "_META", "", "", "_META", "CODE", 0, 0, 0, 0); META_INFO icode(data_type::STR, SIZE_META_CODE_MAX, "_META", "", "","_META", "", 0, 0, 1, 0); META_INFO idescs(data_type::STR, SIZE_DESCS_MAX, "_META", "", "", "_META", "", 0, 0, 0, 0); META_INFO idescl(data_type::STR, SIZE_DESCL_MAX, "_META", "", "", "_META", "", 0, 0, 0, 0); META_INFO iinfo(data_type::STR, 0, "_META", "", "", "_META", "",0, 0, 0, 0); // define the table META_TABLE meta = { { "_META", "Meta data", "Meta data", imeta }, { "CODE", "CODE", "CODE", icode }, { "DESCS", "Short Description", "Short Description", idescs }, { "DESCL", "Long Description", "Long Description", idescl }, { "INFO", "INFO", "INFO", iinfo } }; // performs the database specific code to create a new table db_create_table(meta); // load the meta data into the dictionary and the database table _META for (auto i : meta) insert_meta(i); } }