Chaozhong Yang created HIVE-17460:
-------------------------------------
Summary: `insert overwrite` should support table schema evolution
(e.g. add columns)
Key: HIVE-17460
URL: https://issues.apache.org/jira/browse/HIVE-17460
Project: Hive
Issue Type: Bug
Affects Versions: 2.2.0, 2.1.0
Reporter: Chaozhong Yang
Assignee: Chaozhong Yang
Fix For: 3.0.0
In Hive, adding columns into original table is a common use case. However, If
we insert overwrite older partitions after adding columns, added columns will
not be accessed.
```
create table src_table(
i int
)
PARTITIONED BY (`date` string);
insert overwrite table src_table partition(`date`='20170905') valu
es (3);
select * from src_table where `date` = '20170905';
alter table src_table add columns (bi bigint);
insert overwrite table src_table partition(`date`='20170905') valu
es (3, 5);
select * from src_table where `date` = '20170905';
```
The result will be as follows:
```
3, NULL, '20170905'
```
Obviously, it doesn't meet our expectation. The expected result should be:
```
3, 5, '20170905'
```
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
