fix(impala): remove no-longer-used temporary database and paths that …

…may prevent connection success (#8489)

Remove the creation of temporary resources in the Impala backend, which
are no longer used after the HDFS removal (these temp resources were
used as scratch space for things like dataframe csvs). Fixes #8466.

ibis/backends/impala/__init__.py

@@ -41,7 +41,6 @@
     wrap_udf,
 )
 from ibis.backends.sql import SQLBackend
-from ibis.config import options
 
 if TYPE_CHECKING:
     from collections.abc import Iterator, Mapping
@@ -68,21 +67,6 @@ class Backend(SQLBackend):
 
     supports_in_memory_tables = True
 
-    class Options(ibis.config.Config):
-        """Impala specific options.
-
-        Parameters
-        ----------
-        temp_db : str, default "__ibis_tmp"
-            Database to use for temporary objects.
-        temp_path : str, default "/tmp/ibis"
-            Path for storage of temporary data.
-
-        """
-
-        temp_db: str = "__ibis_tmp"
-        temp_path: str = "/tmp/__ibis"
-
     def _from_url(self, url: str, **kwargs: Any) -> Backend:
         """Connect to a backend using a URL `url`.
 
@@ -212,7 +196,6 @@ def do_connect(
 
         self.con = con
         self.options = {}
-        self._ensure_temp_db_exists()
 
     @cached_property
     def version(self):
@@ -703,12 +686,6 @@ def _get_concrete_table_path(
     ) -> tuple[str, str | None]:
         return name if name is not None else util.gen_name("impala_table"), database
 
-    def _ensure_temp_db_exists(self):
-        # TODO: session memoize to avoid unnecessary `SHOW DATABASES` calls
-        name, path = options.impala.temp_db, options.impala.temp_path
-        if name not in self.list_databases():
-            self.create_database(name, path=path, force=True)
-
     def _drop_table(self, name: str) -> None:
         # database might have been dropped, so we suppress the
         # corresponding Exception

ibis/backends/impala/tests/conftest.py

@@ -154,10 +154,7 @@ def impala_port(self):
     @property
     def tmp_dir(self):
         leaf = util.gen_name("impala_test_tmp_dir")
-        options.impala.temp_path = tmp_dir = os.environ.get(
-            "IBIS_TEST_TMP_DIR", f"/tmp/{leaf}"
-        )
-        return tmp_dir
+        return os.environ.get("IBIS_TEST_TMP_DIR", f"/tmp/{leaf}")
 
     @property
     def test_data_db(self):
@@ -175,8 +172,7 @@ def env():
 
 @pytest.fixture(scope="session")
 def tmp_dir(env):
-    options.impala.temp_path = tmp_dir = env.tmp_dir
-    return tmp_dir
+    return env.tmp_dir
 
 
 @pytest.fixture(scope="session")