yuqi1129 opened a new issue, #9637:
URL: https://github.com/apache/gravitino/issues/9637
### Describe the feature
Currently, `AlterTableAddColumnsRequest` only supports passing a SQL string
when adding new columns
```
public class AlterTableAddColumnsRequest {
public static final String JSON_PROPERTY_ID = "id";
@Nullable
private List<String> id = new ArrayList();
public static final String JSON_PROPERTY_NEW_COLUMNS = "new_columns";
@Nonnull
private List<NewColumnTransform> newColumns = new ArrayList();
public AlterTableAddColumnsRequest() {
}
public class NewColumnTransform {
public static final String JSON_PROPERTY_NAME = "name";
@Nonnull
private String name;
public static final String JSON_PROPERTY_EXPRESSION = "expression";
@Nonnull
private String expression;
public NewColumnTransform() {
}
}
```
Then SQL expresison can be `CAST(NULL AS int)`, `cast((id + 1) as int)`
### Motivation
_No response_
### Describe the solution
_No response_
### Additional context
_No response_
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