"""Create index on certificates table for id desc


Revision ID: f2383bf08fbc
Revises: c87cb989af04
Create Date: 2018-10-11 11:23:31.195471

"""

revision = 'f2383bf08fbc'
down_revision = 'c87cb989af04'

import sqlalchemy as sa
from alembic import op


def upgrade():
    op.create_index('ix_certificates_id_desc', 'certificates', [sa.text('id DESC')], unique=True,
                    postgresql_using='btree')


def downgrade():
    op.drop_index('ix_certificates_id_desc', table_name='certificates')