Fokko commented on code in PR #350:
URL: https://github.com/apache/iceberg-python/pull/350#discussion_r1475048933
##########
pyiceberg/table/__init__.py:
##########
@@ -946,10 +946,13 @@ def append(self, df: pa.Table) -> None:
if len(self.sort_order().fields) > 0:
raise ValueError("Cannot write to tables with a sort-order")
- data_files = _dataframe_to_data_files(self, df=df)
merge = _MergingSnapshotProducer(operation=Operation.APPEND,
table=self)
- for data_file in data_files:
- merge.append_data_file(data_file)
+
+ # skip writing data files if the dataframe is empty
Review Comment:
Does it make sense to produce a commit at all?
##########
pyiceberg/io/pyarrow.py:
##########
@@ -1339,7 +1339,10 @@ def update_min(self, val: Any) -> None:
def update_max(self, val: Any) -> None:
self.current_max = val if self.current_max is None else max(val,
self.current_max)
- def min_as_bytes(self) -> bytes:
+ def min_as_bytes(self) -> Optional[bytes]:
Review Comment:
Interesting, it is only affecting the bytes?
##########
tests/integration/test_writes.py:
##########
@@ -142,6 +142,54 @@ def arrow_table_with_null() -> pa.Table:
return pa.Table.from_pydict(TEST_DATA_WITH_NULL, schema=pa_schema)
[email protected](scope="session")
+def arrow_table_without_data() -> pa.Table:
+ """PyArrow table with all kinds of columns"""
+ pa_schema = pa.schema([
Review Comment:
Should we put this schema in it's own fixture?
##########
tests/integration/test_writes.py:
##########
@@ -142,6 +142,54 @@ def arrow_table_with_null() -> pa.Table:
return pa.Table.from_pydict(TEST_DATA_WITH_NULL, schema=pa_schema)
[email protected](scope="session")
+def arrow_table_without_data() -> pa.Table:
+ """PyArrow table with all kinds of columns"""
+ pa_schema = pa.schema([
+ ("bool", pa.bool_()),
+ ("string", pa.string()),
+ ("string_long", pa.string()),
+ ("int", pa.int32()),
+ ("long", pa.int64()),
+ ("float", pa.float32()),
+ ("double", pa.float64()),
+ ("timestamp", pa.timestamp(unit="us")),
+ ("timestamptz", pa.timestamp(unit="us", tz="UTC")),
+ ("date", pa.date32()),
+ # Not supported by Spark
+ # ("time", pa.time64("us")),
+ # Not natively supported by Arrow
+ # ("uuid", pa.fixed(16)),
+ ("binary", pa.binary()),
+ ("fixed", pa.binary(16)),
+ ])
+ return pa.Table.from_pylist([], schema=pa_schema)
+
+
[email protected](scope="session")
+def arrow_table_with_only_nulls() -> pa.Table:
+ """PyArrow table with all kinds of columns"""
+ pa_schema = pa.schema([
+ ("bool", pa.bool_()),
+ ("string", pa.string()),
+ ("string_long", pa.string()),
Review Comment:
Seem to be identical?
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