wuwenchi opened a new pull request, #22209:
URL: https://github.com/apache/doris/pull/22209

   ## Proposed changes
   problem:
   1. create a iceberg_type catalog:
   2. use iceberg catalog to specify verison
   ```
   mysql> show catalog iceberg;
   +----------------------+--------------------------+
   | Key                  | Value                    |
   +----------------------+--------------------------+
   | type                 | iceberg                  |
   | iceberg.catalog.type | hms                      |
   | hive.metastore.uris  | thrift://127.0.0.1:9083 |
   | hadoop.username      | hadoop                   |
   | create_time          | 2023-07-25 16:51:00.522  |
   +----------------------+--------------------------+
   5 rows in set (0.02 sec)
   
   mysql> select * from iceberg.iceberg_db.tb1 FOR VERSION AS OF 
8783036402036752909;
   ERROR 5090 (42000): errCode = 2, detailMessage = Only iceberg/hudi external 
table supports time travel in current version
   ```
   
   change:
   Add `ICEBERG_EXTERNAL_TABLE` type for specify the version and time
   
   ## Further comments
   
   If this is a relatively large or complex change, kick off the discussion at 
[[email protected]](mailto:[email protected]) by explaining why you 
chose the solution you did and what alternatives you considered, etc...
   
   


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