def upgrade():
    op.alter_column('user', 'birth', existing_type=sa.VARCHAR(length=80), type_=sa.String(length=128), existing_nullable=True)
    op.alter_column('user', 'liscence_2', existing_type=sa.VARCHAR(length=80), type_=sa.String(length=128), existing_nullable=True)
    op.alter_column('user', 'liscence_3', existing_type=sa.VARCHAR(length=80), type_=sa.String(length=128), existing_nullable=True)
    op.alter_column('user', 'liscence_4', existing_type=sa.VARCHAR(length=80), type_=sa.String(length=128), existing_nullable=True)
    op.alter_column('user', 'serial', existing_type=sa.VARCHAR(length=80), type_=sa.String(length=128), existing_nullable=True)
def upgrade():
    op.alter_column('user', 'birth', existing_type=sa.VARCHAR(length=80), type_=sa.String(length=128), existing_nullable=True)
    op.alter_column('user', 'liscence_2', existing_type=sa.VARCHAR(length=80), type_=sa.String(length=128), existing_nullable=True)
    op.alter_column('user', 'liscence_3', existing_type=sa.VARCHAR(length=80), type_=sa.String(length=128), existing_nullable=True)
    op.alter_column('user', 'liscence_4', existing_type=sa.VARCHAR(length=80), type_=sa.String(length=128), existing_nullable=True)
    op.alter_column('user', 'serial', existing_type=sa.VARCHAR(length=80), type_=sa.String(length=128), existing_nullable=True)