[Feature] 请问怎么根据json的多个字段动态化设置sink doris库表名啊

### Search before asking

- [X] I had searched in the [issues](https://github.com/apache/incubator-doris/issues?q=is%3Aissue) and found no similar issues.

### Description

doris库表名动态化指定

### Use case

_No response_

### Related issues

_No response_

### Are you willing to submit PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)

The issue names no files, tests, or entry points. First clarify how multiple JSON fields should determine the Doris sink table name, including the expected configuration and behavior; then identify the connector code and tests that handle sink table naming and define completion with a reproducible example.

Written by the indexing model from the issue text.