content: """optimizing database [37835ce041d2].
  
  Revision ID: 37835ce041d2
  Revises: 0.44.3
  Create Date: 2023-10-04 09:28:23.761274
  
  """
  
  import sqlalchemy as sa
  import sqlmodel
  from alembic import op
  from sqlalchemy.dialects import mysql
  from sqlalchemy.engine.base import Connection
  from sqlalchemy.sql import text
  
  # revision identifiers, used by Alembic.
  revision = "37835ce041d2"
  down_revision = "0.44.3"
  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! ###
      bind: Connection = op.get_bind()
      column_info = sa.inspect(bind).get_columns("pipeline_deployment")
      columns = [c["name"] for c in column_info]
  
      with op.batch_alter_table("pipeline_deployment", schema=None) as batch_op:
          if "client_version" not in columns:
              batch_op.add_column(
                  sa.Column(
                      "client_version",
                      sqlmodel.sql.sqltypes.AutoString(),
                      nullable=True,
                  )
              )
          else:
              batch_op.alter_column(
                  "client_version",
                  existing_type=sqlmodel.sql.sqltypes.AutoString(),
                  nullable=True,
              )
  
          if "server_version" not in columns:
              batch_op.add_column(
                  sa.Column(
                      "server_version",
                      sqlmodel.sql.sqltypes.AutoString(),
                      nullable=True,
                  )
              )
          else:
              batch_op.alter_column(
                  "server_version",
                  existing_type=sqlmodel.sql.sqltypes.AutoString(),
                  nullable=True,
              )
  
          batch_op.alter_column(
              "pipeline_configuration",
              existing_type=sa.TEXT(),
              type_=sa.String(length=16777215).with_variant(
                  mysql.MEDIUMTEXT, "mysql"
              ),
              existing_nullable=False,
          )
  
      # Fill in the values and make fields nullable
      connection = op.get_bind()
  
      update_client_version_query = text(
          """
          UPDATE pipeline_deployment
          SET client_version = (
              SELECT max(pipeline_run.client_version)
              FROM pipeline_run
              WHERE pipeline_run.deployment_id = pipeline_deployment.id
          )
          WHERE EXISTS (
              SELECT 1
              FROM pipeline_run
              WHERE pipeline_run.deployment_id = pipeline_deployment.id
          )
          """
      )
      connection.execute(update_client_version_query)
  
      update_server_version_query = text(
          """
          UPDATE pipeline_deployment
          SET server_version = (
              SELECT max(pipeline_run.server_version)
              FROM pipeline_run
              WHERE pipeline_run.deployment_id = pipeline_deployment.id
          )
          WHERE EXISTS (
              SELECT 1
              FROM pipeline_run
              WHERE pipeline_run.deployment_id = pipeline_deployment.id
          )
          """
      )
      connection.execute(update_server_version_query)
  
      with op.batch_alter_table("step_run", schema=None) as batch_op:
          batch_op.add_column(
              sa.Column(
                  "deployment_id", sqlmodel.sql.sqltypes.GUID(), nullable=True
              )
          )
  
          batch_op.create_foreign_key(
              "fk_step_run_deployment_id_pipeline_deployment",
              "pipeline_deployment",
              ["deployment_id"],
              ["id"],
              ondelete="CASCADE",
          )
          batch_op.alter_column(
              "step_configuration",
              existing_type=sa.String(length=16777215).with_variant(
                  mysql.MEDIUMTEXT, "mysql"
              ),
              nullable=True,
          )
  
          batch_op.drop_column("parameters")
          batch_op.drop_column("enable_artifact_metadata")
          batch_op.drop_column("num_outputs")
          batch_op.drop_column("enable_cache")
          batch_op.drop_column("caching_parameters")
          batch_op.drop_column("entrypoint_name")
  
      connection = op.get_bind()
  
      update_deployment_id = text(
          """
          UPDATE step_run
          SET deployment_id = (
              SELECT pipeline_run.deployment_id
              FROM pipeline_run
              WHERE pipeline_run.id = step_run.pipeline_run_id
          )
          WHERE EXISTS (
              SELECT 1
              FROM pipeline_run
              WHERE pipeline_run.id = step_run.pipeline_run_id
          )
          """
      )
      connection.execute(update_deployment_id)
  
      with op.batch_alter_table("pipeline_run", schema=None) as batch_op:
          batch_op.drop_constraint(
              "fk_pipeline_run_deployment_id_pipeline_deployment",
              type_="foreignkey",
          )
          batch_op.create_foreign_key(
              "fk_pipeline_run_deployment_id_pipeline_deployment",
              "pipeline_deployment",
              ["deployment_id"],
              ["id"],
              ondelete="CASCADE",
          )
          batch_op.drop_column("client_version")
          batch_op.drop_column("git_sha")
          batch_op.drop_column("server_version")
          batch_op.drop_column("num_steps")
          batch_op.drop_column("enable_artifact_metadata")
          batch_op.drop_column("enable_cache")
  
      # ### end Alembic commands ###
  
  
  def downgrade() -> None:
      """Downgrade database schema and/or data back to the previous revision."""
      # ### commands auto generated by Alembic - please adjust! ###
      with op.batch_alter_table("step_run", schema=None) as batch_op:
          batch_op.add_column(
              sa.Column("entrypoint_name", sa.VARCHAR(), nullable=False)
          )
          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("num_outputs", sa.INTEGER(), nullable=True)
          )
          batch_op.add_column(
              sa.Column("enable_artifact_metadata", sa.BOOLEAN(), nullable=True)
          )
          batch_op.add_column(
              sa.Column(
                  "parameters", sa.VARCHAR(length=16777215), nullable=False
              )
          )
          batch_op.drop_constraint(
              "fk_step_run_deployment_id_pipeline_deployment", type_="foreignkey"
          )
          batch_op.drop_column("deployment_id")
  
      with op.batch_alter_table("pipeline_run", schema=None) as batch_op:
          batch_op.add_column(
              sa.Column("build_id", sa.CHAR(length=32), nullable=True)
          )
          batch_op.add_column(
              sa.Column("enable_cache", sa.BOOLEAN(), nullable=True)
          )
          batch_op.add_column(
              sa.Column("enable_artifact_metadata", sa.BOOLEAN(), nullable=True)
          )
          batch_op.add_column(
              sa.Column("pipeline_configuration", sa.TEXT(), nullable=False)
          )
          batch_op.add_column(
              sa.Column("client_environment", sa.TEXT(), nullable=True)
          )
          batch_op.add_column(
              sa.Column("num_steps", sa.INTEGER(), nullable=True)
          )
          batch_op.add_column(
              sa.Column("server_version", sa.VARCHAR(), nullable=True)
          )
          batch_op.add_column(
              sa.Column("schedule_id", sa.CHAR(length=32), nullable=True)
          )
          batch_op.add_column(
              sa.Column("stack_id", sa.CHAR(length=32), nullable=True)
          )
          batch_op.add_column(sa.Column("git_sha", sa.VARCHAR(), nullable=True))
          batch_op.add_column(
              sa.Column("client_version", sa.VARCHAR(), nullable=False)
          )
          batch_op.drop_constraint(
              "fk_pipeline_run_deployment_id_pipeline_deployment",
              type_="foreignkey",
          )
          batch_op.create_foreign_key(
              "fk_pipeline_run_deployment_id_pipeline_deployment",
              "pipeline_deployment",
              ["deployment_id"],
              ["id"],
              ondelete="SET NULL",
          )
          batch_op.create_foreign_key(
              "fk_pipeline_run_schedule_id_schedule",
              "schedule",
              ["schedule_id"],
              ["id"],
              ondelete="SET NULL",
          )
          batch_op.create_foreign_key(
              "fk_pipeline_run_build_id_pipeline_build",
              "pipeline_build",
              ["build_id"],
              ["id"],
              ondelete="SET NULL",
          )
          batch_op.create_foreign_key(
              "fk_pipeline_run_stack_id_stack",
              "stack",
              ["stack_id"],
              ["id"],
              ondelete="SET NULL",
          )
  
      with op.batch_alter_table("pipeline_deployment", schema=None) as batch_op:
          batch_op.alter_column(
              "pipeline_configuration",
              existing_type=sa.String(length=16777215).with_variant(
                  mysql.MEDIUMTEXT, "mysql"
              ),
              type_=sa.TEXT(),
              existing_nullable=False,
          )
          batch_op.drop_column("server_version")
          batch_op.drop_column("client_version")
  
      # ### end Alembic commands ###
  