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"""add pid field to TaskInstance

Revision ID: 5e7d17757c7a
Revises: 8504051e801b
Create Date: 2016-12-07 15:51:37.119478

"""

from alembic import op
import sqlalchemy as sa

# revision identifiers, used by Alembic.
revision = '5e7d17757c7a'
down_revision = '8504051e801b'
branch_labels = None
depends_on = None


def upgrade():
    op.add_column('task_instance', sa.Column('pid', sa.Integer))


def downgrade():
    op.drop_column('task_instance', 'pid')
