geruh commented on code in PR #2871:
URL: https://github.com/apache/iceberg-python/pull/2871#discussion_r2651850774
##########
pyiceberg/table/update/snapshot.py:
##########
@@ -941,6 +948,44 @@ def remove_branch(self, branch_name: str) ->
ManageSnapshots:
"""
return self._remove_ref_snapshot(ref_name=branch_name)
+ def set_current_snapshot(self, snapshot_id: int | None = None, ref_name:
str | None = None) -> ManageSnapshots:
+ """Set the current snapshot to a specific snapshot ID or ref.
+
+ Args:
+ snapshot_id: The ID of the snapshot to set as current.
+ ref_name: The snapshot reference (branch or tag) to set as current.
+
+ Returns:
+ This for method chaining.
+
+ Raises:
+ ValueError: If neither or both arguments are provided, or if the
snapshot/ref does not exist.
+ """
+ self._commit_if_ref_updates_exist()
+
+ if (snapshot_id is None) == (ref_name is None):
+ raise ValueError("Either snapshot_id or ref_name must be provided,
not both")
+
+ target_snapshot_id: int
+ if snapshot_id is not None:
+ target_snapshot_id = snapshot_id
+ else:
+ if ref_name not in self._transaction.table_metadata.refs:
+ raise ValueError(f"Cannot find matching snapshot ID for ref:
{ref_name}")
+ target_snapshot_id =
self._transaction.table_metadata.refs[ref_name].snapshot_id
+
+ if self._transaction.table_metadata.snapshot_by_id(target_snapshot_id)
is None:
+ raise ValueError(f"Cannot set current snapshot to unknown snapshot
id: {target_snapshot_id}")
+
+ update, requirement = self._transaction._set_ref_snapshot(
Review Comment:
We can rip this helper out of transaction and leave in managesnapshots api.
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