SET sql_log_bin=0;
USE accounting;
ALTER TABLE cdr_mos_data
  MODIFY COLUMN mos_average DECIMAL(4,1) DEFAULT NULL,
  MODIFY COLUMN mos_average_packetloss DECIMAL(4,1) DEFAULT NULL,
  MODIFY COLUMN mos_average_jitter DECIMAL(4,1) DEFAULT NULL,
  MODIFY COLUMN mos_average_roundtrip DECIMAL(4,1) DEFAULT NULL;
