snuyanzin opened a new pull request, #27786:
URL: https://github.com/apache/flink/pull/27786
## What is the purpose of the change
Imagine there is an existing materialized table created like
```sql
CREATE MATERIALIZED TABLE t REFRESH_MODE = FULL AS SELECT 1 as id;
```
Then there is another query to update it
```sql
CREATE MATERIALIZED TABLE t REFRESH_MODE = CONTINUOUS AS SELECT 1 as id;
```
where `REFRESH_MODE` is changed.
For now all the validations are passing however under the hood the
`REFRESH_MODE` of old table is used and from new one is just ignored.
For now we can just fail the query instead to make it implicit (may be in
future we will support such change)
## Brief change log
Converter and tests
## Verifying this change
the test is introduced
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): ( no)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: ( no)
- The serializers: ( no)
- The runtime per-record code paths (performance sensitive): (no)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (no)
- The S3 file system connector: (no)
## Documentation
- Does this pull request introduce a new feature? ( no)
- If yes, how is the feature documented? (not applicable)
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