1 [2024-07-01 11:09:20.052] [forward_slot0-(ETLProcessor)-queue_slot1] receive ddl:ALTER TABLE `pre_r3_order`.`oc_b_order` 
2 MODIFY COLUMN `source_code` varchar(61) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '平台单号', checkpoint[1719803359]
3 [2024-07-01 11:13:22.988] [forward_slot0-(ETLProcessor)-queue_slot1] receive ddl:ALTER TABLE `pre_r3_order`.`oc_b_order` 
4 MODIFY COLUMN `source_code` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '平台单号', checkpoint[1719803601]