prune

homeassistant/components/recorder/history/modern.py

@@ -441,10 +441,10 @@ def state_changes_during_period(
         )
 
 
-def _get_last_state_changes_stmt(number_of_states: int, metadata_id: int) -> Select:
+def _get_last_state_changes_single_stmt(metadata_id: int) -> Select:
-    stmt = _stmt_and_join_attributes(False, False)
+    return (
-    if number_of_states == 1:
+        _stmt_and_join_attributes(False, False)
-        stmt = stmt.join(
+        .join(
             (
                 lastest_state_for_metadata_id := (
                     select(
@@ -464,8 +464,19 @@ def _get_last_state_changes_stmt(number_of_states: int, metadata_id: int) -> Sel
                 == lastest_state_for_metadata_id.c.max_last_updated,
             ),
         )
-    else:
+        .outerjoin(
-        stmt = stmt.where(
+            StateAttributes, States.attributes_id == StateAttributes.attributes_id
+        )
+        .order_by(States.state_id.desc())
+    )
+
+
+def _get_last_state_changes_multiple_stmt(
+    number_of_states: int, metadata_id: int
+) -> Select:
+    return (
+        _stmt_and_join_attributes(False, False)
+        .where(
             States.state_id
             == (
                 select(States.state_id)
@@ -475,10 +486,11 @@ def _get_last_state_changes_stmt(number_of_states: int, metadata_id: int) -> Sel
                 .subquery()
             ).c.state_id
         )
-    stmt = stmt.outerjoin(
+        .outerjoin(
-        StateAttributes, States.attributes_id == StateAttributes.attributes_id
+            StateAttributes, States.attributes_id == StateAttributes.attributes_id
-    ).order_by(States.state_id.desc())
+        )
-    return stmt
+        .order_by(States.state_id.desc())
+    )
 
 
 def get_last_state_changes(
@@ -502,10 +514,16 @@ def get_last_state_changes(
             return {}
         metadata_id = possible_metadata_id
         entity_id_to_metadata_id: dict[str, int | None] = {entity_id_lower: metadata_id}
-        stmt = lambda_stmt(
+        if number_of_states == 1:
-            lambda: _get_last_state_changes_stmt(number_of_states, metadata_id),
+            stmt = lambda_stmt(
-            track_on=[number_of_states == 1],
+                lambda: _get_last_state_changes_single_stmt(metadata_id),
-        )
+            )
+        else:
+            stmt = lambda_stmt(
+                lambda: _get_last_state_changes_multiple_stmt(
+                    number_of_states, metadata_id
+                ),
+            )
         states = list(execute_stmt_lambda_element(session, stmt))
         return cast(
             MutableMapping[str, list[State]],

tests/components/recorder/test_history.py

@@ -41,7 +41,6 @@ from .common import (
     wait_recording_done,
 )
 
-from tests.common import mock_state_change_event
 from tests.typing import RecorderInstanceGenerator
 
 
@@ -118,44 +117,6 @@ def _add_db_entries(
             )
 
 
-def _setup_get_states(hass):
-    """Set up for testing get_states."""
-    states = []
-    now = dt_util.utcnow()
-    with patch(
-        "homeassistant.components.recorder.core.dt_util.utcnow", return_value=now
-    ):
-        for i in range(5):
-            state = ha.State(
-                f"test.point_in_time_{i % 5}",
-                f"State {i}",
-                {"attribute_test": i},
-            )
-
-            mock_state_change_event(hass, state)
-
-            states.append(state)
-
-        wait_recording_done(hass)
-
-    future = now + timedelta(seconds=1)
-    with patch(
-        "homeassistant.components.recorder.core.dt_util.utcnow", return_value=future
-    ):
-        for i in range(5):
-            state = ha.State(
-                f"test.point_in_time_{i % 5}",
-                f"State {i}",
-                {"attribute_test": i},
-            )
-
-            mock_state_change_event(hass, state)
-
-        wait_recording_done(hass)
-
-    return now, future, states
-
-
 def test_get_full_significant_states_with_session_entity_no_matches(
     hass_recorder: Callable[..., HomeAssistant]
 ) -> None: