code: def upgrade():
      # As a fix for https://github.com/mlflow/mlflow/issues/3785, create an index on run_uuid columns
      # that have a foreign key constraint to speed up SQL operations.
      for table in ["params", "metrics", "latest_metrics", "tags"]:
          op.create_index(
              f"index_{table}_run_uuid", table, ["run_uuid"]
          )
  
label_desc: Use image node_id 1 for calling a global function with example usage: upgrade() without return types