From 0d92d380ad38cae19252ebbfc8ecce7825d5b1c6 Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Tue, 11 Apr 2023 13:37:59 -0700
Subject: [PATCH 1/3] BUG: to_numeric(errors='coerce', dtype_backend='pyarrow')
 with ArrowDtype

---
 doc/source/whatsnew/v2.0.1.rst        |  1 +
 pandas/core/tools/numeric.py          |  3 ++-
 pandas/tests/tools/test_to_numeric.py | 10 ++++++++++
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/doc/source/whatsnew/v2.0.1.rst b/doc/source/whatsnew/v2.0.1.rst
index 7b4dc890da3e1..601737abe4e54 100644
--- a/doc/source/whatsnew/v2.0.1.rst
+++ b/doc/source/whatsnew/v2.0.1.rst
@@ -30,6 +30,7 @@ Bug fixes
 - Bug in :func:`pandas.testing.assert_series_equal` where ``check_dtype=False`` would still raise for datetime or timedelta types with different resolutions (:issue:`52449`)
 - Bug in :meth:`ArrowDtype.__from_arrow__` not respecting if dtype is explicitly given (:issue:`52533`)
 - Bug in :func:`read_csv` casting PyArrow datetimes to NumPy when ``dtype_backend="pyarrow"`` and ``parse_dates`` is set causing a performance bottleneck in the process (:issue:`52546`)
+- Bug in :func:`to_numeric` with ``errors='coerce'`` and ``dtype_backend='pyarrow'`` with :class:`ArrowDtype` data (:issue:`52588`)
 
 .. ---------------------------------------------------------------------------
 .. _whatsnew_201.other:
diff --git a/pandas/core/tools/numeric.py b/pandas/core/tools/numeric.py
index 04443f89ddf6f..418536c61c7da 100644
--- a/pandas/core/tools/numeric.py
+++ b/pandas/core/tools/numeric.py
@@ -275,7 +275,8 @@ def to_numeric(
     # GH33013: for IntegerArray, BooleanArray & FloatingArray need to reconstruct
     # masked array
     if (mask is not None or new_mask is not None) and not is_string_dtype(values.dtype):
-        if mask is None:
+        if mask is None or (new_mask is not None and errors == "coerce"):
+            # GH 52588
             mask = new_mask
         else:
             mask = mask.copy()
diff --git a/pandas/tests/tools/test_to_numeric.py b/pandas/tests/tools/test_to_numeric.py
index fe6794b120681..499bcae5e90f0 100644
--- a/pandas/tests/tools/test_to_numeric.py
+++ b/pandas/tests/tools/test_to_numeric.py
@@ -6,6 +6,7 @@
 
 import pandas as pd
 from pandas import (
+    ArrowDtype,
     DataFrame,
     Index,
     Series,
@@ -942,3 +943,12 @@ def test_invalid_dtype_backend():
     )
     with pytest.raises(ValueError, match=msg):
         to_numeric(ser, dtype_backend="numpy")
+
+
+def test_coerce_pyarrow_backend():
+    # GH 52588
+    pa = pytest.importorskip("pyarrow")
+    ser = Series(list("12x"), dtype=ArrowDtype(pa.string()))
+    result = to_numeric(ser, errors="coerce", dtype_backend="pyarrow")
+    expected = Series([1, 2, None], dtype=ArrowDtype(pa.int64()))
+    tm.assert_series_equal(result, expected)

From e9260724b130832b9de141c79419e092235dae03 Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Tue, 11 Apr 2023 13:42:50 -0700
Subject: [PATCH 2/3] Use safer check

---
 pandas/core/tools/numeric.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pandas/core/tools/numeric.py b/pandas/core/tools/numeric.py
index 418536c61c7da..fb08205d20890 100644
--- a/pandas/core/tools/numeric.py
+++ b/pandas/core/tools/numeric.py
@@ -275,7 +275,9 @@ def to_numeric(
     # GH33013: for IntegerArray, BooleanArray & FloatingArray need to reconstruct
     # masked array
     if (mask is not None or new_mask is not None) and not is_string_dtype(values.dtype):
-        if mask is None or (new_mask is not None and errors == "coerce"):
+        if mask is None or (
+            mask is not None and new_mask is not None and new_mask.shape == mask.shape
+        ):
             # GH 52588
             mask = new_mask
         else:

From 8d853b818b3934950ff1c7de83ec6b42c8db69c0 Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Tue, 11 Apr 2023 13:50:17 -0700
Subject: [PATCH 3/3] Remove unnecessary check

---
 pandas/core/tools/numeric.py | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/pandas/core/tools/numeric.py b/pandas/core/tools/numeric.py
index fb08205d20890..a06152272797f 100644
--- a/pandas/core/tools/numeric.py
+++ b/pandas/core/tools/numeric.py
@@ -275,9 +275,7 @@ def to_numeric(
     # GH33013: for IntegerArray, BooleanArray & FloatingArray need to reconstruct
     # masked array
     if (mask is not None or new_mask is not None) and not is_string_dtype(values.dtype):
-        if mask is None or (
-            mask is not None and new_mask is not None and new_mask.shape == mask.shape
-        ):
+        if mask is None or (new_mask is not None and new_mask.shape == mask.shape):
             # GH 52588
             mask = new_mask
         else: