CREATE TABLE IF NOT EXISTS plugin_vertretung_absences (
  id INT AUTO_INCREMENT PRIMARY KEY,
  staff_id INT NOT NULL,
  substitute_id INT NOT NULL,
  start_date DATE NOT NULL,
  end_date DATE NOT NULL,
  note VARCHAR(255) NOT NULL DEFAULT '',
  status VARCHAR(12) NOT NULL DEFAULT 'planned',
  created_by INT NULL,
  created_at DATETIME NOT NULL,
  KEY idx_plugin_vertretung_status (status, start_date)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
CREATE TABLE IF NOT EXISTS plugin_vertretung_moves (
  id INT AUTO_INCREMENT PRIMARY KEY,
  absence_id INT NOT NULL,
  ticket_id INT NOT NULL,
  from_staff_id INT NOT NULL,
  to_staff_id INT NOT NULL,
  created_at DATETIME NOT NULL,
  returned_at DATETIME NULL,
  KEY idx_plugin_vertretung_moves_absence (absence_id, returned_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4