Test for pd.to_sql column error if data contains -np.inf

doc/source/whatsnew/v1.1.0.rst

@@ -901,6 +901,7 @@ I/O
 - Bug in :meth:`~DataFrame.read_feather` was raising an `ArrowIOError` when reading an s3 or http file path (:issue:`29055`)
 - Bug in :meth:`~DataFrame.to_excel` could not handle the column name `render` and was raising an ``KeyError`` (:issue:`34331`)
 - Bug in :meth:`~SQLDatabase.execute` was raising a ``ProgrammingError`` for some DB-API drivers when the SQL statement contained the `%` character and no parameters were present (:issue:`34211`)
+- Bug in :meth:`DataFrame.to_sql` when reading DataFrames with `-np.inf` entries (:issue: `34431`)
 
 Plotting
 ^^^^^^^^

pandas/tests/io/test_sql.py

@@ -1813,6 +1813,18 @@ def main(connectable):
         DataFrame({"test_foo_data": [0, 1, 2]}).to_sql("test_foo_data", self.conn)
         main(self.conn)
 
+    @pytest.mark.parametrize(
+        "_input",
+        [{"foo": [np.inf]}, {"foo": [-np.inf]}, {"foo": [-np.inf], "infe0": ["bar"]}],
+    )
+    def test_to_sql_with_negative_npinf(self, _input):
+        # GH 34431
+
+        df = pd.DataFrame(_input)
+        df.to_sql("foobar", self.conn, index=False)
+        res = sql.read_sql_table("foobar", self.conn)
+        tm.assert_equal(df, res)
+
     def test_temporary_table(self):
         test_data = "Hello, World!"
         expected = DataFrame({"spam": [test_data]})