Hi folks, Thanks, everyone, for the great discussion and feedback on the PolicyMappingRecord topic.
To summarize, we have general agreement that we need a new record, PolicyMappingRecord, to represent and persist the relationship of a Policy Attachment (e.g., attaching a policy to a table). To support this, we will introduce this new persistence item and add the necessary persistence APIs and MetastoreManager APIs to ensure proper interaction. PolicyMappingRecord and its persistence APIs are designed similarly to existing GrantRecords, which store privilege granting relationships between securable and grantee entities. Additionally, to allow policy-related efforts to proceed in parallel with the ongoing persistence refactoring and new persistence implementation, the new persistence APIs will default to raising a "not implemented" error. This allows the new persistence implementation to optionally support Policy Mapping persistence APIs. If these APIs are not implemented, policy attachment and detachment will simply be unsupported for that persistence backend. I've consolidated the discussions and design into a PR: https://github.com/apache/polaris/pull/1104 Please take a look when you have a chance. Let me know if you have any questions. Best regards, Honah (Jonas)
