manuzhang commented on code in PR #12115: URL: https://github.com/apache/iceberg/pull/12115#discussion_r1947552684
########## docs/docs/spark-procedures.md: ########## @@ -972,4 +972,91 @@ CALL catalog_name.system.compute_table_stats(table => 'my_table', snapshot_id => Collect statistics of the snapshot with id `snap1` of table `my_table` for columns `col1` and `col2` ```sql CALL catalog_name.system.compute_table_stats(table => 'my_table', snapshot_id => 'snap1', columns => array('col1', 'col2')); -``` \ No newline at end of file +``` + +## Table Replication + +The `rewrite-table-path` assists in moving or copying an Iceberg table from one location to another. + +### `rewrite-table-path` + +This procedure writes a new copy of the Iceberg table's metadata files where every path has had its prefix replaced. +The newly rewritten metadata files enable moving or coping an Iceberg table to a new location. +After copying both metadata and data to the desired location, the replicated iceberg +table will appear identical to the source table, including snapshot history, schema and partition specs. + +!!! info + This procedure only creates metadata for an existing Iceberg table modified for a new location. The produced file_list can be used for copying rewritten metadata and data files to the new location. + Copying/Moving metadata and data files to the new location is not part of this procedure. + + +| Argument Name | Required? | default | Type | Description | +|--------------------|-----------|------------------------------------------------|--------|-------------------------------------------------------------------------| +| `table` | ✔️ | | string | Name of the table | +| `source_prefix` | ✔️ | | string | The existing prefix to be replaced | +| `target_prefix` | ✔️ | | string | The replacement prefix for `source_prefix` | +| `start_version` | | first metadata.json in table's metadata log | string | The name or path to the chronologically first metadata.json to rewrite. | +| `end_version` | | latest metadata.json | string | The name or path to the chronologically last metadata.json to rewrite | +| `staging_location` | | new directory under table's metadata directory | string | The output location for newly modified metadata files | + + +#### Modes of operation: + +- Full Rewrite: + +By default, the procedure operates in full rewrite mode, rewriting all reachable metadata files. This includes metadata.json, manifest lists, manifests, and position delete files. + +- Incremental Rewrite: + +If `start_version` is provided, the procedure will only rewrite metadata files created between `start_version` and `end_version`. `end_version` defaults to the latest metadata location of the table. + +#### Output + +| Output Name | Type | Description | +|----------------------|--------|-------------------------------------------------------------------------------------| +| `latest_version` | string | Name of the latest metadata file rewritten by this procedure | +| `file_list_location` | string | Path to a file containing a listing of comma-separated source and destination paths | Review Comment: How about "Path to a csv file containing a mapping of source to target paths"? * csv file is comma-separated by nature * `target paths` to be consistent with `target prefix` -- 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