skip trino and impala

ibis/backends/__init__.py

@@ -1272,11 +1272,16 @@ def has_operation(cls, operation: type[ops.Value]) -> bool:
             f"{cls.name} backend has not implemented `has_operation` API"
         )
 
+    @util.experimental
     def read_parquet(
         self, path: str | Path, table_name: str | None = None, **kwargs: Any
     ) -> ir.Table:
         """Register a parquet file as a table in the current backend.
 
+        This function reads a Parquet file and registers it as a table in the current
+        backend. Note that for Impala and Trino backends, the performance
+        may be suboptimal.
+
         Parameters
         ----------
         path

ibis/backends/tests/test_register.py

@@ -418,6 +418,12 @@ def test_register_garbage(con, monkeypatch):
 def test_read_parquet(con, tmp_path, data_dir, fname, in_table_name):
     pq = pytest.importorskip("pyarrow.parquet")
 
+    if con.name in ("trino", "impala"):
+        # TODO: remove after trino and impala have efficient insertion
+        pytest.skip(
+            "Both Impala and Trino lack efficient data insertion methods from Python."
+        )
+
     fname = Path(fname)
     fname = Path(data_dir) / "parquet" / fname.name
     table = pq.read_table(fname)