fix(hive): Update _latest_partition_from_df in HiveEngineSpec to work on tables with multiple indexes (#14302)

* Fix _latest_partition_from_df in HiveEngineSpec

* Add test HiveEngineSpec._latest_partition_from_df

* Fix formatting to pass black

Co-authored-by: Ville Brofeldt <ville.v.brofeldt@gmail.com>

superset/db_engine_specs/hive.py

@@ -429,9 +429,12 @@ class HiveEngineSpec(PrestoEngineSpec):
 
     @classmethod
     def _latest_partition_from_df(cls, df: pd.DataFrame) -> Optional[List[str]]:
-        """Hive partitions look like ds={partition name}"""
+        """Hive partitions look like ds={partition name}/ds={partition name}"""
         if not df.empty:
-            return [df.iloc[:, 0].max().split("=")[1]]
+            return [
+                partition_str.split("=")[1]
+                for partition_str in df.iloc[:, 0].max().split("/")
+            ]
         return None
 
     @classmethod

tests/integration_tests/db_engine_specs/hive_tests.py

@@ -17,6 +17,7 @@
 # isort:skip_file
 from datetime import datetime
 from unittest import mock
+from typing import List
 
 import pytest
 import pandas as pd
@@ -379,3 +380,23 @@ def test_where_latest_partition_no_columns_no_values(mock_method):
             "test_table", "test_schema", db, select()
         )
     assert result is None
+
+
+def test__latest_partition_from_df():
+    def is_correct_result(data: List, result: List) -> bool:
+        df = pd.DataFrame({"partition": data})
+        return HiveEngineSpec._latest_partition_from_df(df) == result
+
+    assert is_correct_result(["ds=01-01-19"], ["01-01-19"])
+    assert is_correct_result(
+        ["ds=01-01-19", "ds=01-03-19", "ds=01-02-19"], ["01-03-19"]
+    )
+    assert is_correct_result(["ds=01-01-19/hour=1"], ["01-01-19", "1"])
+    assert is_correct_result(
+        ["ds=01-01-19/hour=1", "ds=01-03-19/hour=1", "ds=01-02-19/hour=1"],
+        ["01-03-19", "1"],
+    )
+    assert is_correct_result(
+        ["ds=01-01-19/hour=1", "ds=01-03-19/hour=1", "ds=01-02-19/hour=2"],
+        ["01-03-19", "1"],
+    )