diff --git a/src/pyodb/schema/base/_operators.py b/src/pyodb/schema/base/_operators.py
index 392a5d7..f477b69 100644
--- a/src/pyodb/schema/base/_operators.py
+++ b/src/pyodb/schema/base/_operators.py
@@ -211,6 +211,9 @@ def _break_down_type(cls, type_: type | UnionType | GenericAlias) -> type | Unio
         if hasattr(type_, "__origin__"):
             type_ = type_.__origin__
 
+        if type_ is Any:
+            raise MixedTypesError("Type of class member cannot be 'Any'!")
+
         return type_
 
 
diff --git a/src/pyodb/schema/base/_sql_builders.py b/src/pyodb/schema/base/_sql_builders.py
index d3a5bca..41791b6 100644
--- a/src/pyodb/schema/base/_sql_builders.py
+++ b/src/pyodb/schema/base/_sql_builders.py
@@ -125,6 +125,7 @@ def commit(self, dbconn: sql.Connection) -> None:
         insert = insert[:-1] + ");"
         with dbconn as conn:
             conn.executemany(insert, self._vals)
+            conn.commit()
 
 
     @property
diff --git a/test/pyodb/schema/base/sql_builders_test.py b/test/pyodb/schema/base/sql_builders_test.py
index bea6fdc..8475e6a 100644
--- a/test/pyodb/schema/base/sql_builders_test.py
+++ b/test/pyodb/schema/base/sql_builders_test.py
@@ -1,7 +1,7 @@
 from pathlib import Path
 from test.test_models.complex_models import ComplexMulti
 from test.test_models.primitive_models import PrimitiveBasic, PrimitiveContainer
-from time import time
+from time import sleep, time
 from unittest import TestCase
 
 from pyodb.error import BadTypeError, ExpiryError, ParentError, QueryError