stevenzwu commented on code in PR #11041: URL: https://github.com/apache/iceberg/pull/11041#discussion_r1861263489
########## format/view-spec.md: ########## @@ -158,6 +174,57 @@ Each entry in `version-log` is a struct with the following fields: | _required_ | `timestamp-ms` | Timestamp when the view's `current-version-id` was updated (ms from epoch) | | _required_ | `version-id` | ID that `current-version-id` was set to | +#### Partial identifier + +The partial identifier holds a reference, containing a namespace and a name, of a table or view in the catalog. + +| Requirement | Field name | Description | +|-------------|----------------|-------------| +| _required_ | `namespace` | A list of namespace levels | +| _required_ | `name` | A string specifying the name of the source table | + +### Materialized View Metadata stored as part of the Table Metadata + +To be able to determine the freshness of the precomputed data, additional metadata is stored as part of the storage table. + +For that the additional field "refresh-state" is introduced as an opaque record in the table snapshot summary. + +| Requirement | Field name | Description | +|-------------|----------------|-------------| +| _required_ | `refresh-state` | A [refresh state](#refresh-state) record stored as a JSON-encoded string | + +#### Refresh state + +The refresh state record captures the state of all source tables and source views in the fully expanded query tree of the materialized view, including indirect references. It has the following fields: + +| Requirement | Field name | Description | +|-------------|----------------|-------------| +| _required_ | `refresh-version-id` | The `version-id` of the materialized view when the refresh operation was performed | +| _required_ | `source-table-states` | A list of [source table](#soure-table) records for all tables that are directly or indirectly referenced in the materialized view query | Review Comment: maybe it is more clear to change `indirectly` to `transitively`. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@iceberg.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@iceberg.apache.org For additional commands, e-mail: issues-h...@iceberg.apache.org
