修改hive表字段的注释修改之前hive> desc dw.fct_user_ctag_today;
OK
user_id int 用户id
user_tag int 精准化新老客标签
rpt_tag int 报表新老客标签
group_rpt_tag int 拼团报表用户标签
date string
# Partition Information
# col_name data_type comment
date string Time taken: 0.04 seconds, Fetched: 10 row(s)
alter tablehive> use dw;hive> alter table fct_user_ctag_today CHANGE COLUMN rpt_tag rpt_tag int comment '1新客，2新转老，3新注册，5老客';
修改之后hive> desc dw.fct_user_ctag_today;
OK
user_id int 用户id
user_tag int 精准化新老客标签
rpt_tag int 1新客，2新转老，3新注册，5老客
group_rpt_tag int 拼团报表用户标签
date string
# Partition Information
# col_name data_type comment
date string Time taken: 0.031 seconds, Fetched: 10 row(s)
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