text: from datetime import datetime
  
  from sqlalchemy import Column, Integer, BigInteger, String, DateTime, Text, Float
  from sqlalchemy.ext.declarative import declarative_base
  
  Base = declarative_base()
  
  class PipelineTest(Base):
      __tablename__ = 'pipeline_tests'
      id = Column(Integer, primary_key=True)
      datetime_added = Column(DateTime, default=datetime.now())
      review_paper_id = Column(BigInteger)
      random_seed = Column(Integer)
      datadir = Column(Text)
      num_correctly_predicted = Column(Integer)
      num_target_papers = Column(Integer)
      num_target_in_candidates = Column(Integer)
      num_seed_papers = Column(Integer)
      score_correctly_predicted = Column(Float)
      num_candidates = Column(Integer)
      features = Column(Text)
      clf = Column(Text)
      clf_type = Column(String(64))
      time_fit = Column(Integer)
      time_predict = Column(Integer)
      saved_model = Column(Text)
  