Hive指定位置增加字段及解决columns have types incompatible with the existing columns in their respective positio

Posted 2022-07-29 光于前裕于后

完整报错信息：
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 :

解决办法：

set hive.metastore.disallow.incompatible.col.type.changes=false;

其实就是打开强转，但我遇到这个问题不是为了改字段类型，是为了指定位置增加Hive字段，见下：

1.先增加列

alter table table_name add columns (col int comment '列注释');

2.修改位置

alter table table_name change col col int after ori_col;