hive 更改列的位置时遇到的问题

hive > desc formatted tb_fq;
OK
col_name    data_type    comment
# col_name                data_type               comment
name                    string
age                     int
fdate                   date
userid                  string
myid                    int                                         

# Partition Information
# col_name                data_type               comment
time                    date

hive > alter table tb_fq change column myid myid int after name ;
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. Unable to alter table. The following columns have types incompatible with the existing columns in their respective positions :
age,fdate

感觉只要是列的类型不同列换位置就行不通啊！并且这种更换只是元数据换了，里面存的数据还是原来的！鸡肋操作