alembic use sql statement instead of sqlalchemy

I know it’s pretty popular to use the wonderful sqlalchemy ORM for python, especially combined with alembic, but sometimes you just want to type plain SQL request.

And actually it’s pretty easy, after creating your migrations just do:

"""your description

Revision ID: 0c8ab27d3408
Revises: d58bd4ed2b03
Create Date: 2016-03-18 13:13:24.228036

"""
# revision identifiers, used by Alembic.
revision = '0c8ab27d3408'
down_revision = 'd58bd4ed2b03'
branch_labels = None
depends_on = None

from alembic import op


def upgrade():
    conn = op.get_bind()
    conn.execute("DROP TABLE whatever")


def downgrade():

    conn = op.get_bind()
    conn.execute("CREATE TABLE IF NOT EXISTS whatever (id smallint)")