Merging upstream version 23.7.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/sqlglot/optimizer/optimizer.py b/sqlglot/optimizer/optimizer.py
index 1c96e95..c82b8aa 100644
--- a/sqlglot/optimizer/optimizer.py
+++ b/sqlglot/optimizer/optimizer.py
@@ -82,13 +82,13 @@ def optimize(
         **kwargs,
     }
 
-    expression = exp.maybe_parse(expression, dialect=dialect, copy=True)
+    optimized = exp.maybe_parse(expression, dialect=dialect, copy=True)
     for rule in rules:
         # Find any additional rule parameters, beyond `expression`
         rule_params = rule.__code__.co_varnames
         rule_kwargs = {
             param: possible_kwargs[param] for param in rule_params if param in possible_kwargs
         }
-        expression = rule(expression, **rule_kwargs)
+        optimized = rule(optimized, **rule_kwargs)
 
-    return t.cast(exp.Expression, expression)
+    return optimized