HonahX commented on code in PR #200:
URL: https://github.com/apache/iceberg-python/pull/200#discussion_r1421997549
##########
pyiceberg/table/__init__.py:
##########
@@ -540,18 +540,38 @@ def update_table_metadata(base_metadata: TableMetadata,
updates: Tuple[TableUpda
class TableRequirement(IcebergBaseModel):
type: str
+ @abstractmethod
+ def validate(self, base_metadata: TableMetadata) -> None:
+ """Validate the requirement against the base metadata.
+
+ Args:
+ base_metadata: The base metadata to be validated against.
+
+ Raises:
+ CommitFailedException: When the requirement is not met.
+ """
+ ...
+
class AssertCreate(TableRequirement):
"""The table must not already exist; used for create transactions."""
type: Literal["assert-create"] = Field(default="assert-create")
+ def validate(self, base_metadata: Optional[TableMetadata]) -> None:
Review Comment:
Thanks for the suggestion! I updated the signature and also add None-checks
for other requirements, which will raise exception when the current table
metadata is None.
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