patch: fix duckdb narwhals_to_native_dtype for Int32 and UInt32 (…

…#1857)

patch: fix duckdb narwhals_to_native_dtype Int32 and UInt32

narwhals/_duckdb/utils.py

@@ -163,15 +163,15 @@ def narwhals_to_native_dtype(dtype: DType | type[DType], version: Version) -> st
     if isinstance_or_issubclass(dtype, dtypes.Int64):
         return "BIGINT"
     if isinstance_or_issubclass(dtype, dtypes.Int32):
-        return "INT"
+        return "INTEGER"
     if isinstance_or_issubclass(dtype, dtypes.Int16):
         return "SMALLINT"
     if isinstance_or_issubclass(dtype, dtypes.Int8):
         return "TINYINT"
     if isinstance_or_issubclass(dtype, dtypes.UInt64):
         return "UBIGINT"
     if isinstance_or_issubclass(dtype, dtypes.UInt32):
-        return "UINT"
+        return "UINTEGER"
     if isinstance_or_issubclass(dtype, dtypes.UInt16):  # pragma: no cover
         return "USMALLINT"
     if isinstance_or_issubclass(dtype, dtypes.UInt8):  # pragma: no cover

tests/expr_and_series/cast_test.py

@@ -55,15 +55,14 @@
 }
 
 SPARK_INCOMPATIBLE_COLUMNS = {"e", "f", "g", "h", "l", "o", "p"}
+DUCKDB_INCOMPATIBLE_COLUMNS = {"l", "o", "p"}
 
 
 @pytest.mark.filterwarnings("ignore:casting period[M] values to int64:FutureWarning")
 def test_cast(
     constructor: Constructor,
     request: pytest.FixtureRequest,
 ) -> None:
-    if "duckdb" in str(constructor):
-        request.applymarker(pytest.mark.xfail)
     if "pyarrow_table_constructor" in str(constructor) and PYARROW_VERSION <= (
         15,
     ):  # pragma: no cover
@@ -74,6 +73,8 @@ def test_cast(
 
     if "pyspark" in str(constructor):
         incompatible_columns = SPARK_INCOMPATIBLE_COLUMNS  # pragma: no cover
+    elif "duckdb" in str(constructor):
+        incompatible_columns = DUCKDB_INCOMPATIBLE_COLUMNS  # pragma: no cover
     else:
         incompatible_columns = set()