munendrasn commented on issue #6763:
URL: https://github.com/apache/iceberg/issues/6763#issuecomment-1422946779
With the above plan, schema would remain same for the table, while writing
Namespace entries we would swap values (identifier, and namespace columns)
As for backward compatibility, I had couple of ideas
* Deprecate current Impl, and introduce new DynamoDbCatalog impl
* Give option to user where users can specify the how to store the Namespace
entries using config `dynamodb.namespace-as-identifier` which can default to
`false` at least in the beginning. This flag/config can be used to decide the
namespace entry storage. Essentially, two approaches fit into single
implementation
* `listNamespace` also need to consume this config, and fetch entries
differently
I agree, eventually migration might be required for the existing users.
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