soumya-ghosh commented on code in PR #977:
URL: https://github.com/apache/iceberg-python/pull/977#discussion_r1700724132
##########
pyiceberg/table/__init__.py:
##########
@@ -1189,15 +1197,48 @@ def update_table_metadata(
new_metadata = _apply_table_update(update, new_metadata, context)
# Update last_updated_ms if it was not updated by update operations
- if context.has_changes() and base_metadata.last_updated_ms ==
new_metadata.last_updated_ms:
- new_metadata = new_metadata.model_copy(update={"last_updated_ms":
datetime_to_millis(datetime.now().astimezone())})
+ if context.has_changes():
+ if metadata_location:
+ new_metadata = _update_table_metadata_log(new_metadata,
metadata_location, base_metadata.last_updated_ms)
+ if base_metadata.last_updated_ms == new_metadata.last_updated_ms:
+ new_metadata = new_metadata.model_copy(update={"last_updated_ms":
datetime_to_millis(datetime.now().astimezone())})
if enforce_validation:
return TableMetadataUtil.parse_obj(new_metadata.model_dump())
else:
return new_metadata.model_copy(deep=True)
+def _update_table_metadata_log(base_metadata: TableMetadata,
metadata_location: str, last_updated_ms: int) -> TableMetadata:
+ """
+ Update the metadata log of the table.
+
+ Args:
+ base_metadata: The base metadata to be updated.
+ metadata_location: Current metadata location of the table
+ last_updated_ms: The timestamp of the last update of table metadata
+
+ Returns:
+ The metadata with the updates applied to metadata-log.
+ """
+ max_metadata_log_entries = max(
+ 1,
+ PropertyUtil.property_as_int(
+ base_metadata.properties,
+ TableProperties.METADATA_PREVIOUS_VERSIONS_MAX,
+ TableProperties.METADATA_PREVIOUS_VERSIONS_MAX_DEFAULT,
+ ), # type: ignore
+ )
+ previous_metadata_log = base_metadata.metadata_log
+ if len(base_metadata.metadata_log) >= max_metadata_log_entries: # type:
ignore
+ remove_index = len(base_metadata.metadata_log) -
max_metadata_log_entries + 1 # type: ignore
+ previous_metadata_log = base_metadata.metadata_log[remove_index:]
+ metadata_updates: Dict[str, Any] = {
Review Comment:
Again, kept is same as Java implementation, but can be done the other way as
well.
Let me know, if this change is required.
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