tencent cloud

ALTER TABLE table_name 
 [PARTITION 
   (partition_col1_name = partition_col1_value
   [,partition_col2_name = partition_col2_value][,...])]
  ADD COLUMNS (col_name data_type) [RESTRICT | CASCADE]

ALTER TABLE events ADD COLUMNS (eventowner string);

ALTER TABLE events ADD COLUMNS (eventowner string) CASCADE;

//ALTER TABLE PARTITION ADD COLUMNS语法仅支持DLC原生表
ALTER TABLE events PARTITION (year='2021') ADD COLUMNS (event string);