liyubin117 opened a new pull request, #5413:
URL: https://github.com/apache/paimon/pull/5413
<!-- Please specify the module before the PR name: [core] ... or [flink] ...
-->
### Purpose
```
Flink SQL> create table branch12(id int);
[INFO] Execute statement succeeded.
Flink SQL> call sys.create_branch('default.branch12','b1');
+---------+
| result |
+---------+
| Success |
+---------+
1 row in set
Flink SQL> insert into branch12 values (1),(2);
[INFO] Submitting SQL update statement to the cluster...
[INFO] SQL update statement has been successfully submitted to the cluster:
Job ID: 411cafe166d80987b061b3ef76e443e8
Flink SQL> insert into branch12$branch_b1 values (3),(4),(5);
[INFO] Submitting SQL update statement to the cluster...
[INFO] SQL update statement has been successfully submitted to the cluster:
Job ID: 934cfd698d6b0383504bffeba9957283
Flink SQL> select count(1) from branch12;
+--------+
| EXPR$0 |
+--------+
| 2 |
+--------+
1 row in set (0.84 seconds)
Flink SQL> select count(1) from branch12$branch_b1;
+--------+
| EXPR$0 |
+--------+
| 3 |
+--------+
1 row in set (0.69 seconds)
Flink SQL> alter table branch12 set ('branch'='b1');
[INFO] Execute statement succeeded.
Flink SQL> call sys.fast_forward('default.branch12','b1');
+---------+
| result |
+---------+
| Success |
+---------+
1 row in set
Flink SQL> select count(1) from branch12;
+--------+
| EXPR$0 |
+--------+
| 0 |
+--------+
1 row in set (0.79 seconds)
Flink SQL> select count(1) from branch12$branch_b1;
+--------+
| EXPR$0 |
+--------+
| 0 |
+--------+
1 row in set (0.58 seconds)
```
<!-- What is the purpose of the change -->
### Tests
<!-- List UT and IT cases to verify this change -->
### API and Format
<!-- Does this change affect API or storage format -->
### Documentation
<!-- Does this change introduce a new feature -->
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