fix: ODPS (MaxCompute) data source table preview failed (#38174)

Co-authored-by: zhutong6688 <zhutong66@163.com>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

tests/unit_tests/sql/parse_tests.py

@@ -32,6 +32,7 @@ from superset.sql.parse import (
     KQLTokenType,
     KustoKQLStatement,
     LimitMethod,
+    Partition,
     process_jinja_sql,
     remove_quotes,
     RLSMethod,
@@ -139,6 +140,41 @@ def test_table_qualify() -> None:
     assert qualified.catalog == table.catalog
 
 
+def test_partition() -> None:
+    """
+    Test the `Partition` class and its string conversion.
+    """
+    # Test partitioned table with partition columns
+    partition = Partition(is_partitioned_table=True, partition_column=("col1", "col2"))
+    assert partition.is_partitioned_table is True
+    assert partition.partition_column == ("col1", "col2")
+    assert (
+        str(partition)
+        == "Partition(is_partitioned_table=True, partition_column=[col1, col2])"
+    )
+
+    # Test non-partitioned table
+    partition_none = Partition(is_partitioned_table=False, partition_column=None)
+    assert partition_none.is_partitioned_table is False
+    assert partition_none.partition_column is None
+    assert (
+        str(partition_none)
+        == "Partition(is_partitioned_table=False, partition_column=[None])"
+    )
+
+    # Test equality
+    partition1 = Partition(is_partitioned_table=True, partition_column=("col1",))
+    partition2 = Partition(is_partitioned_table=True, partition_column=("col1",))
+    partition3 = Partition(is_partitioned_table=True, partition_column=("col2",))
+    assert partition1 == partition2
+    assert partition1 != partition3
+
+    # A frozen dataclass with a tuple field must be hashable (a list field would
+    # raise TypeError: unhashable type at hash time).
+    assert hash(partition1) == hash(partition2)
+    assert len({partition1, partition2, partition3}) == 2
+
+
 def extract_tables_from_sql(sql: str, engine: str = "postgresql") -> set[Table]:
     """
     Helper function to extract tables from SQL.