content: """Add Caching Info [6a28c4fd0ef2].
  
  Revision ID: 6a28c4fd0ef2
  Revises: 26b776ad583e
  Create Date: 2022-11-22 12:59:26.081411
  
  """
  
  import sqlalchemy as sa
  import sqlmodel
  from alembic import op
  
  # revision identifiers, used by Alembic.
  revision = "6a28c4fd0ef2"
  down_revision = "26b776ad583e"
  branch_labels = None
  depends_on = None
  
  
  def upgrade() -> None:
      """Upgrade database schema and/or data, creating a new revision."""
      # ### commands auto generated by Alembic - please adjust! ###
      with op.batch_alter_table("pipeline_run", schema=None) as batch_op:
          batch_op.add_column(
              sa.Column("enable_cache", sa.Boolean(), nullable=True)
          )
          batch_op.add_column(
              sa.Column("start_time", sa.DateTime(), nullable=True)
          )
          batch_op.add_column(
              sa.Column("end_time", sa.DateTime(), nullable=True)
          )
  
      with op.batch_alter_table("step_run", schema=None) as batch_op:
          batch_op.add_column(
              sa.Column("caching_parameters", sa.TEXT(), nullable=True)
          )
          batch_op.add_column(
              sa.Column("enable_cache", sa.Boolean(), nullable=True)
          )
          batch_op.add_column(
              sa.Column(
                  "code_hash", sqlmodel.sql.sqltypes.AutoString(), nullable=True
              )
          )
          batch_op.add_column(
              sa.Column(
                  "cache_key", sqlmodel.sql.sqltypes.AutoString(), nullable=True
              )
          )
          batch_op.add_column(
              sa.Column("start_time", sa.DateTime(), nullable=True)
          )
          batch_op.add_column(
              sa.Column("end_time", sa.DateTime(), nullable=True)
          )
          batch_op.add_column(
              sa.Column(
                  "original_step_run_id",
                  sqlmodel.sql.sqltypes.GUID(),
                  nullable=True,
              )
          )
          batch_op.create_foreign_key(
              "fk_step_run_original_step_run_id_step_run",
              "step_run",
              ["original_step_run_id"],
              ["id"],
              ondelete="SET NULL",
          )
  
      # ### end Alembic commands ###
  
  
  def downgrade() -> None:
      """Downgrade database schema and/or data back to the previous revision.
  
      Raises:
          NotImplementedError: Downgrade is not supported for this migration.
      """
      raise NotImplementedError("Downgrade not supported.")
  