From 68e4e607acf5339e65854d263dd261b03f66b0ed Mon Sep 17 00:00:00 2001
From: Pieter Roggemans <pieter.roggemans@gmail.com>
Date: Sat, 9 Aug 2025 23:46:28 +0200
Subject: [PATCH 1/2] ENH: add whether append is supported in list_drivers

---
 pyogrio/_ogr.pyx           | 19 ++++++++++++++-----
 pyogrio/tests/test_core.py |  9 ++++++---
 2 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/pyogrio/_ogr.pyx b/pyogrio/_ogr.pyx
index 404029dd..3efac9a4 100644
--- a/pyogrio/_ogr.pyx
+++ b/pyogrio/_ogr.pyx
@@ -100,6 +100,14 @@ def get_gdal_config_option(str name):
     return str_value
 
 
+def ogr_driver_supports_update(driver):
+    # check metadata for driver to see if it supports update
+    if _get_driver_metadata_item(driver, "DCAP_UPDATE") == "YES":
+        return True
+
+    return False
+
+
 def ogr_driver_supports_write(driver):
     # check metadata for driver to see if it supports write
     if _get_driver_metadata_item(driver, "DCAP_CREATE") == "YES":
@@ -125,14 +133,15 @@ def ogr_list_drivers():
     for i in range(OGRGetDriverCount()):
         driver = OGRGetDriver(i)
         name_c = <char *>OGR_Dr_GetName(driver)
-
         name = get_string(name_c)
 
+        capability = "r"
+        IF CTE_GDAL_VERSION >= (3, 11, 0):
+            if ogr_driver_supports_update(name):
+                capability += "a"
         if ogr_driver_supports_write(name):
-            drivers[name] = "rw"
-
-        else:
-            drivers[name] = "r"
+            capability += "w"
+        drivers[name] = capability
 
     return drivers
 
diff --git a/pyogrio/tests/test_core.py b/pyogrio/tests/test_core.py
index e428beb9..52532f9f 100644
--- a/pyogrio/tests/test_core.py
+++ b/pyogrio/tests/test_core.py
@@ -18,7 +18,7 @@
     vsi_rmtree,
     vsi_unlink,
 )
-from pyogrio._compat import GDAL_GE_38
+from pyogrio._compat import GDAL_GE_38, GDAL_GE_311
 from pyogrio._env import GDALEnv
 from pyogrio.errors import DataLayerError, DataSourceError
 from pyogrio.raw import read, write
@@ -136,11 +136,14 @@ def test_list_drivers():
     for name in ("ESRI Shapefile", "GeoJSON", "GeoJSONSeq", "GPKG", "OpenFileGDB"):
         assert name in all_drivers
 
-        expected_capability = "rw"
+        if GDAL_GE_311 and name in ("ESRI Shapefile", "GeoJSON", "GPKG", "OpenFileGDB"):
+            expected_capability = "raw"
+        else:
+            expected_capability = "rw"
         if name == "OpenFileGDB" and __gdal_version__ < (3, 6, 0):
             expected_capability = "r"
 
-        assert all_drivers[name] == expected_capability
+        assert all_drivers[name] == expected_capability, f"Error for {name}"
 
     drivers = list_drivers(read=True)
     expected = {k: v for k, v in all_drivers.items() if v.startswith("r")}

From 5a85bd38ab95bfe853f021c763762e5f688b72c0 Mon Sep 17 00:00:00 2001
From: Pieter Roggemans <pieter.roggemans@gmail.com>
Date: Sun, 10 Aug 2025 00:31:58 +0200
Subject: [PATCH 2/2] Update test_core.py

---
 pyogrio/tests/test_core.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyogrio/tests/test_core.py b/pyogrio/tests/test_core.py
index 52532f9f..8fcb79ba 100644
--- a/pyogrio/tests/test_core.py
+++ b/pyogrio/tests/test_core.py
@@ -136,7 +136,7 @@ def test_list_drivers():
     for name in ("ESRI Shapefile", "GeoJSON", "GeoJSONSeq", "GPKG", "OpenFileGDB"):
         assert name in all_drivers
 
-        if GDAL_GE_311 and name in ("ESRI Shapefile", "GeoJSON", "GPKG", "OpenFileGDB"):
+        if GDAL_GE_311:
             expected_capability = "raw"
         else:
             expected_capability = "rw"