old_contents: """create jobstep command table
  
  Revision ID: 3f6a69c14037
  Revises: 19b8969073ab
  Create Date: 2014-07-15 15:47:01.960708
  
  """
  
  # revision identifiers, used by Alembic.
  revision = '3f6a69c14037'
  down_revision = '19b8969073ab'
  
  from alembic import op
  import sqlalchemy as sa
  from sqlalchemy.dialects import postgresql
  
  
  def upgrade():
      op.create_table(
          'command',
          sa.Column('id', sa.GUID(), nullable=False),
          sa.Column('jobstep_id', sa.GUID(), nullable=False),
          sa.Column('label', sa.String(length=128), nullable=False),
          sa.Column('status', sa.Enum(), nullable=False),
          sa.Column('return_code', sa.Integer(), nullable=False),
          sa.Column('script', sa.Text(), nullable=False),
          sa.Column('env', sa.String(length=2048), nullable=True),
          sa.Column('cwd', sa.String(length=256), nullable=True),
          sa.Column('artifacts', postgresql.ARRAY(sa.String(length=256)), nullable=True),
          sa.Column('date_started', sa.DateTime(), nullable=True),
          sa.Column('date_finished', sa.DateTime(), nullable=True),
          sa.Column('date_created', sa.DateTime(), nullable=True),
          sa.Column('data', sa.JSONEncodedDict(), nullable=True),
          sa.ForeignKeyConstraint(['jobstep_id'], ['jobstep.id'], ),
          sa.PrimaryKeyConstraint('id')
      )
  
  
  def downgrade():
      op.drop_table('command')
  
new_contents: """create jobstep command table
  
  Revision ID: 3f6a69c14037
  Revises: 21a9d1ebe15c
  Create Date: 2014-07-15 15:47:01.960708
  
  """
  
  # revision identifiers, used by Alembic.
  revision = '3f6a69c14037'
  down_revision = '21a9d1ebe15c'
  
  from alembic import op
  import sqlalchemy as sa
  from sqlalchemy.dialects import postgresql
  
  
  def upgrade():
      op.create_table(
          'command',
          sa.Column('id', sa.GUID(), nullable=False),
          sa.Column('jobstep_id', sa.GUID(), nullable=False),
          sa.Column('label', sa.String(length=128), nullable=False),
          sa.Column('status', sa.Enum(), nullable=False),
          sa.Column('return_code', sa.Integer(), nullable=False),
          sa.Column('script', sa.Text(), nullable=False),
          sa.Column('env', sa.String(length=2048), nullable=True),
          sa.Column('cwd', sa.String(length=256), nullable=True),
          sa.Column('artifacts', postgresql.ARRAY(sa.String(length=256)), nullable=True),
          sa.Column('date_started', sa.DateTime(), nullable=True),
          sa.Column('date_finished', sa.DateTime(), nullable=True),
          sa.Column('date_created', sa.DateTime(), nullable=True),
          sa.Column('data', sa.JSONEncodedDict(), nullable=True),
          sa.ForeignKeyConstraint(['jobstep_id'], ['jobstep.id'], ),
          sa.PrimaryKeyConstraint('id')
      )
  
  
  def downgrade():
      op.drop_table('command')
  
subject: Update down revision for command migration