syun64 commented on code in PR #921:
URL: https://github.com/apache/iceberg-python/pull/921#discussion_r1676465583
##########
pyiceberg/io/pyarrow.py:
##########
@@ -2079,36 +2083,63 @@ def _check_schema_compatible(table_schema: Schema,
other_schema: pa.Schema, down
Raises:
ValueError: If the schemas are not compatible.
"""
- name_mapping = table_schema.name_mapping
- try:
- task_schema = pyarrow_to_schema(
- other_schema, name_mapping=name_mapping,
downcast_ns_timestamp_to_us=downcast_ns_timestamp_to_us
- )
- except ValueError as e:
- other_schema = _pyarrow_to_schema_without_ids(other_schema,
downcast_ns_timestamp_to_us=downcast_ns_timestamp_to_us)
- additional_names = set(other_schema.column_names) -
set(table_schema.column_names)
- raise ValueError(
- f"PyArrow table contains more columns: {',
'.join(sorted(additional_names))}. Update the schema first (hint, use
union_by_name)."
- ) from e
-
- if table_schema.as_struct() != task_schema.as_struct():
- from rich.console import Console
- from rich.table import Table as RichTable
+ task_schema = assign_fresh_schema_ids(
+ _pyarrow_to_schema_without_ids(other_schema,
downcast_ns_timestamp_to_us=downcast_ns_timestamp_to_us)
+ )
- console = Console(record=True)
+ extra_fields = task_schema.field_names - table_schema.field_names
+ missing_fields = table_schema.field_names - task_schema.field_names
+ fields_in_both =
task_schema.field_names.intersection(table_schema.field_names)
+
+ from rich.console import Console
+ from rich.table import Table as RichTable
+
+ console = Console(record=True)
+
+ rich_table = RichTable(show_header=True, header_style="bold")
+ rich_table.add_column("Field Name")
+ rich_table.add_column("Category")
+ rich_table.add_column("Table field")
+ rich_table.add_column("Dataframe field")
+
+ def print_nullability(required: bool) -> str:
+ return "required" if required else "optional"
+
+ for field_name in fields_in_both:
+ lhs = table_schema.find_field(field_name)
+ rhs = task_schema.find_field(field_name)
+ # Check nullability
+ if lhs.required != rhs.required:
+ rich_table.add_row(
+ field_name,
+ "Nullability",
+ f"{print_nullability(lhs.required)} {str(lhs.field_type)}",
+ f"{print_nullability(rhs.required)} {str(rhs.field_type)}",
+ )
+ # Check if type is consistent
+ if any(
+ (isinstance(lhs.field_type, container_type) and
isinstance(rhs.field_type, container_type))
+ for container_type in {StructType, MapType, ListType}
Review Comment:
the field_names list contains both parent and children fields as separate
entries. We ignore checking the type of the parent if they are any of the
container types (StructType, MapType and ListType), because the overall type of
the container will be unequal: MapType(StringType, IntegerType) !=
MapType(StringType, StringType). We can leave the comparison of the children
when we are checking the child nodes.
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