rdblue commented on issue #24560: [SPARK-27661][SQL] Add SupportsNamespaces API URL: https://github.com/apache/spark/pull/24560#issuecomment-490589684 @mccheah, @jzhuge, @cloud-fan, and @marmbrus, it would be great to get feedback on this early prototype of the namespace API. I think we may want to split this into two APIs depending on how catalogs handle namespaces. Not all catalogs will explicitly create namespaces. For example, you could think of paths as namespaces for tables in S3, but paths don't exist in S3 without objects so there is no "create" operation. Namespaces exist only if there are tables or objects in them. So we could have separate interfaces for the list and exists calls and another for namespaces that have metadata, like Hive.
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