JingsongLi opened a new pull request, #428:
URL: https://github.com/apache/flink-table-store/pull/428
In some scenarios, users need to get the changelog to do some auditing work,
such as determining the number of updates and inserts.
We can provide audit_log system table, users can get the rowkind information
column.
```
INSERT INTO T VALUES ('1', '2', '3');
INSERT INTO T VALUES ('1', '4', '5');
SELECT * FROM T$audit_log;
```
users can get:
- "+I", "1", "2", "3"
- "-U", "1", "2", "3";
- "+U", "1", "4", "5"
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