fix: Fix test_empty_parquet

Author: FredericKayser

awswrangler/s3/_read_parquet.py

@@ -247,14 +247,16 @@ def _read_parquet_chunked(
             if pq_file is None:
                 continue
 
+            schema = pq_file.schema.to_arrow_schema()
+            if columns:
+                schema = pa.schema([schema.field(column) for column in columns], schema.metadata)
+
             use_threads_flag: bool = use_threads if isinstance(use_threads, bool) else bool(use_threads > 1)
+            iterate_at_least_once = False
             for chunk in pq_file.iter_batches(
                 batch_size=batch_size, columns=columns, use_threads=use_threads_flag, use_pandas_metadata=False
             ):
-                schema = pq_file.schema.to_arrow_schema()
-                if columns:
-                    schema = pa.schema([schema.field(column) for column in columns], schema.metadata)
-
+                iterate_at_least_once = True
                 table = _add_table_partitions(
                     table=pa.Table.from_batches([chunk], schema=schema),
                     path=path,
@@ -273,6 +275,15 @@ def _read_parquet_chunked(
                         next_slice = None
                     else:
                         next_slice = df
+            if not iterate_at_least_once:
+                table = _add_table_partitions(
+                    table=pa.Table.from_batches([], schema=schema),
+                    path=path,
+                    path_root=path_root,
+                )
+                df = _table_to_df(table=table, kwargs=arrow_kwargs)
+                yield df
+
     if next_slice is not None:
         yield next_slice