[jira] [Created] (FLINK-24389) getDescription() in `CatalogTableImpl` should check null

[Neng Lu (Jira)]

Neng Lu created FLINK-24389:
-------------------------------

             Summary: getDescription() in `CatalogTableImpl` should check null
                 Key: FLINK-24389
                 URL: https://issues.apache.org/jira/browse/FLINK-24389
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / API
            Reporter: Neng Lu


```
@Override
public Optional<String> getDescription() {
    return Optional.of(getComment());
}
```

If the table comment is not set, then `getDescription` will throw 
NullPointerException 

[https://github.com/apache/flink/blame/5b9e7882207357120717966d8bf7efd53c53ede5/flink-table/flink-table-api-java/src/main/java/org/apache/flink/table/catalog/CatalogTableImpl.java#L69]

 



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