fix(trino): ensure that list_databases look at all catalogs not just …

…the current one

ibis/backends/trino/__init__.py

@@ -45,13 +45,11 @@ def current_database(self) -> str:
         return self._scalar_query(sa.select(sa.literal_column("current_catalog")))
 
     def list_databases(self, like: str | None = None) -> list[str]:
-        s = sa.table(
-            "schemata",
-            sa.column("catalog_name", sa.VARCHAR()),
-            schema="information_schema",
-        )
+        query = "SHOW CATALOGS"
+        with self.begin() as con:
+            catalogs = list(con.exec_driver_sql(query).scalars())
+        return self._filter_with_like(catalogs, like=like)
 
-        query = sa.select(sa.distinct(s.c.catalog_name)).order_by(s.c.catalog_name)
         with self.begin() as con:
             results = list(con.execute(query).scalars())
         return self._filter_with_like(results, like=like)

ibis/backends/trino/tests/test_client.py

@@ -46,3 +46,13 @@ def test_hive_table_overwrite(tmp_name):
     t = con.create_table(tmp_name, schema=schema, overwrite=True)
     assert tmp_name in con.list_tables()
     assert t.schema() == schema
+
+
+def test_list_catalogs(con):
+    assert {"hive", "postgresql", "memory", "system", "tpch", "tpcds"}.issubset(
+        con.list_databases()
+    )
+
+
+def test_list_schemas(con):
+    assert {"information_schema", "sf1"}.issubset(con.list_schemas(database="tpch"))