sqlalchemy bulk_insert_mappings会生成大量的插入批次，这是可以避免的吗？

from sqlalchemy import create_engine

engine = create_engine('mysql://username:password@localhost/dbname')

conn = engine.connect()

values = [
    {'name': 'John', 'age': 25},
    {'name': 'Jane', 'age': 30},
    {'name': 'Bob', 'age': 35}
]

insert_values = ','.join([f"('{v['name']}', {v['age']})" for v in values])

sql = f"INSERT INTO table_name (name, age) VALUES {insert_values}"

conn.execute(sql)

conn.close()

from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker

engine = create_engine('mysql://username:password@localhost/dbname')

Session = sessionmaker(bind=engine)
session = Session()

values = [
    {'name': 'John', 'age': 25},
    {'name': 'Jane', 'age': 30},
    {'name': 'Bob', 'age': 35}
]

objects = [MyModel(name=v['name'], age=v['age']) for v in values]

session.add_all(objects)
session.commit()

session.close()