module mysql #flag -lmysqlclient #flag linux -I/usr/include/mysql #include // TODO: Documentation pub struct Connection { mut: conn &C.MYSQL = C.mysql_init(0) pub mut: host string = '127.0.0.1' port u32 = 3306 username string password string dbname string flag int } // connect connects to a MySQL server. pub fn (mut conn Connection) connect() ?bool { instance := C.mysql_init(conn.conn) conn.conn = C.mysql_real_connect( conn.conn, conn.host.str, conn.username.str, conn.password.str, conn.dbname.str, conn.port, 0, conn.flag ) if isnil(conn.conn) { return error_with_code(get_error_msg(instance), get_errno(instance)) } return true } // query executes an SQL query. // `query()` cannot be used for statements that contain binary data; you must use `real_query()` instead. pub fn (conn Connection) query(q string) ?Result { if C.mysql_query(conn.conn, q.str) != 0 { return error_with_code(get_error_msg(conn.conn), get_errno(conn.conn)) } res := C.mysql_store_result(conn.conn) return Result{res} } // real_query executes an SQL query. Same as `query ()`, // But `real_query ()` can be used for statements containing binary data. // (Binary data may contain the \0 character, which `query()` interprets as the end of the statement string). // In addition, `real_query()` is faster than `query()`. pub fn (conn Connection) real_query(q string) ?Result { if C.mysql_real_query(conn.conn, q.str, q.len) != 0 { return error_with_code(get_error_msg(conn.conn), get_errno(conn.conn)) } res := C.mysql_store_result(conn.conn) return Result{res} } // select_db selects the default database for database queries. pub fn (conn Connection) select_db(dbname string) ?bool { if C.mysql_select_db(conn.conn, dbname.str) != 0 { return error_with_code(get_error_msg(conn.conn), get_errno(conn.conn)) } return true } // change_user changes the user of the specified database connection. // if desired, the empty string value can be passed to the `dbname` parameter // resulting in only changing the user and not selecting a database. pub fn (conn Connection) change_user(username, password, dbname string) ?bool { mut ret := true if dbname != '' { ret = C.mysql_change_user(conn.conn, username.str, password.str, dbname.str) } else { ret = C.mysql_change_user(conn.conn, username.str, password.str, 0) } if !ret { return error_with_code(get_error_msg(conn.conn), get_errno(conn.conn)) } return ret } // affected_rows returns the number of rows changed/deleted/inserted // by the last UPDATE, DELETE, or INSERT query. pub fn (conn Connection) affected_rows() u64 { return C.mysql_affected_rows(conn.conn) } // autocommit turns on or off auto-committing database modifications. pub fn (conn Connection) autocommit(mode bool) { C.mysql_autocommit(conn.conn, mode) } // tables returns list of tables that match the `wildcard` parameter. // If empty string is passed, will return all tables. pub fn (conn Connection) tables(wildcard string) ?[]string { cres := C.mysql_list_tables(conn.conn, wildcard.str) if isnil(cres) { return error_with_code(get_error_msg(conn.conn), get_errno(conn.conn)) } res := Result{cres} mut tables := []string{} for row in res.rows() { tables << row.vals[0] } res.free() return tables } // escape_string creates a legal SQL string for use in an SQL statement. pub fn (conn Connection) escape_string(s string) string { len := C.strlen(s.str) to := malloc(2 * len + 1) quote := byte(39) // single quote C.mysql_real_escape_string_quote(conn.conn, to, s.str, len, quote) return unsafe { to.vstring() } } // set_option is used to set extra connect options and affect behavior for a connection. // This function may be called multiple times to set several options. // To retrieve option values, use `get_option()`. pub fn (conn Connection) set_option(option_type int, val voidptr) { C.mysql_options(conn.conn, option_type, val) } // get_option returns the current value of an option settable `set_option`. // The value should be treated as read only. pub fn (conn Connection) get_option(option_type int) ?voidptr { ret := voidptr(0) if C.mysql_get_option(conn.conn, option_type, &ret) != 0 { return error_with_code(get_error_msg(conn.conn), get_errno(conn.conn)) } return ret } // refresh flushes tables or caches, or resets replication server information. // The connected user must have the `RELOAD` privilege. pub fn (conn Connection) refresh(options u32) ?bool { if C.mysql_refresh(conn.conn, options) != 0 { return error_with_code(get_error_msg(conn.conn), get_errno(conn.conn)) } return true } // reset resets the connection to clear the session state. pub fn (conn Connection) reset() ?bool { if C.mysql_reset_connection(conn.conn) != 0 { return error_with_code(get_error_msg(conn.conn), get_errno(conn.conn)) } return true } // ping pings a server connection, or tries to reconnect if the connection has gone down. pub fn (conn Connection) ping() ?bool { if C.mysql_ping(conn.conn) != 0 { return error_with_code(get_error_msg(conn.conn), get_errno(conn.conn)) } return true } // close closes a previously opened database connection. pub fn (conn &Connection) close() { C.mysql_close(conn.conn) } /* -------------------------- MYSQL INFO & VERSION -------------------------- */ // info returns information about the most recently executed query. pub fn (conn Connection) info() string { return resolve_nil_str(C.mysql_info(conn.conn)) } // get_host_info returns a string describing the connection. pub fn (conn Connection) get_host_info() string { return unsafe { C.mysql_get_host_info(conn.conn).vstring() } } // get_server_info returns the server version number as a string. pub fn (conn Connection) get_server_info() string { return unsafe { C.mysql_get_server_info(conn.conn).vstring() } } // get_server_version returns the server version number as an integer. pub fn (conn Connection) get_server_version() u64 { return C.mysql_get_server_version(conn.conn) } /* --------------------------------- CLIENT --------------------------------- */ // get_client_info returns client version information as a string. pub fn get_client_info() string { return unsafe { C.mysql_get_client_info().vstring() } } // get_client_version returns client version information as an integer. pub fn get_client_version() u64 { return C.mysql_get_client_version() } /* ------------------------------- MYSQL DEBUG ------------------------------ */ // dump_debug_info causes the server to write debug information to the log pub fn (conn Connection) dump_debug_info() ?bool { if C.mysql_dump_debug_info(conn.conn) != 0 { return error_with_code(get_error_msg(conn.conn), get_errno(conn.conn)) } return true } // debug does a `DBUG_PUSH` with the given string. // See https://dev.mysql.com/doc/refman/5.7/en/mysql-debug.html pub fn debug(debug string) { C.mysql_debug(debug.str) }