1 files changed, 3 insertions, 1 deletions
diff --git a/sqlglot/optimizer/optimizer.py b/sqlglot/optimizer/optimizer.py
index d9d04be..62eb11e 100644
--- a/sqlglot/optimizer/optimizer.py
+++ b/sqlglot/optimizer/optimizer.py
@@ -21,6 +21,7 @@ from sqlglot.optimizer.pushdown_predicates import pushdown_predicates
 from sqlglot.optimizer.pushdown_projections import pushdown_projections
 from sqlglot.optimizer.qualify_columns import qualify_columns, validate_qualify_columns
 from sqlglot.optimizer.qualify_tables import qualify_tables
+from sqlglot.optimizer.simplify import simplify
 from sqlglot.optimizer.unnest_subqueries import unnest_subqueries
 from sqlglot.schema import ensure_schema
 
@@ -43,6 +44,7 @@ RULES = (
     eliminate_ctes,
     annotate_types,
     canonicalize,
+    simplify,
 )
 
 
@@ -78,7 +80,7 @@ def optimize(
     Returns:
         sqlglot.Expression: optimized expression
     """
-    schema = ensure_schema(schema or sqlglot.schema)
+    schema = ensure_schema(schema or sqlglot.schema, dialect=dialect)
     possible_kwargs = {"db": db, "catalog": catalog, "schema": schema, **kwargs}
     expression = exp.maybe_parse(expression, dialect=dialect, copy=True)
     for rule in rules: