From d02aa49c440e553c694e046abb05bb8f698bd38d Mon Sep 17 00:00:00 2001
From: Luke Manley <lukemanley@gmail.com>
Date: Sat, 25 Feb 2023 21:23:14 +0100
Subject: [PATCH 1/2] BUG: Series.any and Series.all for empty or all-null
 pyarrow-backed dtypes (#51631)

* BUG: ArrowExtensionArray boolean reductions for empty or all null array

* whatsnew

* clarify whatsnew
---
 pandas/core/arrays/arrow/array.py    |  4 ++++
 pandas/tests/extension/test_arrow.py | 16 ++++++++++------
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/pandas/core/arrays/arrow/array.py b/pandas/core/arrays/arrow/array.py
index e9122544a18f5..c0e23d98ad411 100644
--- a/pandas/core/arrays/arrow/array.py
+++ b/pandas/core/arrays/arrow/array.py
@@ -1145,6 +1145,10 @@ def pyarrow_meth(data, skip_nulls, **kwargs):
                 # Let ExtensionArray._reduce raise the TypeError
                 return super()._reduce(name, skipna=skipna, **kwargs)
 
+        # GH51624: pyarrow defaults to min_count=1, pandas behavior is min_count=0
+        if name in ["any", "all"] and "min_count" not in kwargs:
+            kwargs["min_count"] = 0
+
         try:
             result = pyarrow_meth(data_to_reduce, skip_nulls=skipna, **kwargs)
         except (AttributeError, NotImplementedError, TypeError) as err:
diff --git a/pandas/tests/extension/test_arrow.py b/pandas/tests/extension/test_arrow.py
index 8555f26e84c16..c770aeb796706 100644
--- a/pandas/tests/extension/test_arrow.py
+++ b/pandas/tests/extension/test_arrow.py
@@ -2328,9 +2328,13 @@ def test_dt_tz_localize(unit):
     tm.assert_series_equal(result, expected)
 
 
-def test_concat_empty_arrow_backed_series(dtype):
-    # GH#51734
-    ser = pd.Series([], dtype=dtype)
-    expected = ser.copy()
-    result = pd.concat([ser[np.array([], dtype=np.bool_)]])
-    tm.assert_series_equal(result, expected)
+@pytest.mark.parametrize("skipna", [True, False])
+def test_boolean_reduce_series_all_null(all_boolean_reductions, skipna):
+    # GH51624
+    ser = pd.Series([None], dtype="float64[pyarrow]")
+    result = getattr(ser, all_boolean_reductions)(skipna=skipna)
+    if skipna:
+        expected = all_boolean_reductions == "all"
+    else:
+        expected = pd.NA
+    assert result is expected

From 6b97adcb77104753b22a9714de040a593032e08d Mon Sep 17 00:00:00 2001
From: Patrick Hoefler <patrick_hoefler@gmx.net>
Date: Wed, 15 Mar 2023 21:33:18 +0100
Subject: [PATCH 2/2] Add whatsnew

---
 doc/source/whatsnew/v2.0.0.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/source/whatsnew/v2.0.0.rst b/doc/source/whatsnew/v2.0.0.rst
index ba2f504b4c944..a06d37d164bc8 100644
--- a/doc/source/whatsnew/v2.0.0.rst
+++ b/doc/source/whatsnew/v2.0.0.rst
@@ -1360,6 +1360,7 @@ ExtensionArray
 - Bug in :class:`Series` constructor unnecessarily overflowing for nullable unsigned integer dtypes (:issue:`38798`, :issue:`25880`)
 - Bug in setting non-string value into ``StringArray`` raising ``ValueError`` instead of ``TypeError`` (:issue:`49632`)
 - Bug in :meth:`DataFrame.reindex` not honoring the default ``copy=True`` keyword in case of columns with ExtensionDtype (and as a result also selecting multiple columns with getitem (``[]``) didn't correctly result in a copy) (:issue:`51197`)
+- Bug in :meth:`Series.any` and :meth:`Series.all` returning ``NA`` for empty or all null pyarrow-backed data when ``skipna=True`` (:issue:`51624`)
 - Bug in :class:`~arrays.ArrowExtensionArray` logical operations ``&`` and ``|`` raising ``KeyError`` (:issue:`51688`)
 
 Styler