Call arrayop::db_connect
to establish a connection
get_default_connection(.report_error_if_not_connected = TRUE)
Whether to report error if db_connect
has not been called before this function. Default TRUE to ensure a valid
connection object is returned or throw an error. Set to FALSE, if we need to
test if a connection object exists or not without causing an error.
E.g. conn_obj_available = get_default_connection(F)$has_connected()
The default ScidbConnection object. Report error if db_connect
is
not called prior to this function.