The SYSCS_UTIL.SYSCS_FREEZE_DATABASE system procedure temporarily freezes the database for backup.
See "Using operating system commands with the freeze and unfreeze system procedures to perform an online backup" in the Derby Server and Administration Guide for more information on using this procedure.
SYSCS_UTIL.SYSCS_FREEZE_DATABASE()
No result set is returned by this procedure.
If authentication and SQL authorization are both enabled, only the database owner has execute privileges on this procedure by default. See "Enabling user authentication" and "Setting the SQL standard authorization mode" in the Derby Developer's Guide for more information. The database owner can grant access to other users.
String backupdirectory = "c:/mybackups/" + JCalendar.getToday();
CallableStatement cs = conn.prepareCall
("CALL SYSCS_UTIL.SYSCS_FREEZE_DATABASE()");
cs.execute();
cs.close();
// user supplied code to take full backup of "backupdirectory"
// now unfreeze the database once backup has completed:
CallableStatement cs = conn.prepareCall
("CALL SYSCS_UTIL.SYSCS_UNFREEZE_DATABASE()");
cs.execute();
cs.close();