perf(sqlalchemy): lazily construct the inspector object

ibis-project · May 22, 2023 · 8db5624 · 8db5624
1 parent 31ce741
commit 8db5624
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/ibis/backends/base/sql/alchemy/__init__.py b/ibis/backends/base/sql/alchemy/__init__.py
@@ -121,7 +121,7 @@ def _current_schema(self) -> str | None:
 
     def do_connect(self, con: sa.engine.Engine) -> None:
         self.con = con
-        self._inspector = sa.inspect(self.con)
+        self._inspector = None
         self._schemas: dict[str, sch.Schema] = {}
         self._temp_views: set[str] = set()
 
@@ -141,6 +141,8 @@ def list_databases(self, like=None):
 
     @property
     def inspector(self):
+        if self._inspector is None:
+            self._inspector = sa.inspect(self.con)
         self._inspector.info_cache.clear()
         return self._inspector