修改字段类型

ALTER TABLE esg_dsp.ODS_ACDM_T_ACDM_STAND_RULE_AIRLINE_kafka
MODIFY COLUMN before string NULL COMMENT "更新前航班信息";
 
ALTER TABLE esg_dsp.ODS_ACDM_T_ACDM_STAND_RULE_AIRLINE_kafka
MODIFY COLUMN after string NULL COMMENT "更新后航班信息";