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								from sqlalchemy import Column, Integer, String, DateTime
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								from config.database import Base
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								from datetime import datetime
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								class Metatask(Base):
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								    """
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								    元数据任务表
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								    """
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								    __tablename__ = 'meta_metatask'
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								    metatask_id = Column(Integer, primary_key=True, autoincrement=True, comment='任务主键')
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								    metatask_name = Column(String(50), nullable=True, default='', comment='任务名称')
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								    metatask_type = Column(String(5), nullable=True, default='N', comment='任务类型(0 采集 1加工)')
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								    create_by = Column(String(64), nullable=True, default='', comment='创建者')
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								    create_time = Column(DateTime, nullable=True, default=datetime.now(), comment='创建时间')
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								    update_by = Column(String(64), nullable=True, default='', comment='更新者')
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								    update_time = Column(DateTime, nullable=True, default=datetime.now(), comment='更新时间')
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								    remark = Column(String(500), nullable=True, default=None, comment='备注')
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								    status = Column(String(10), nullable=True, default='OFFLINE', comment='状态')
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								    ds_time = Column(DateTime, nullable=True, default=None, comment='调度时间')
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								    dbRName = Column(String(50), nullable=True, default=None, comment='数据源名称')
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								    dbRCode = Column(Integer, nullable=True, default=None, comment='数据源ID')
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								    dbName = Column(String(50), nullable=True, default=None, comment='数据库名称')
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								    dbCode = Column(String(50), nullable=True, default=None, comment='数据库ID')
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								    dbSName = Column(String(50), nullable=True, default=None, comment='模式名称')
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								    dbSCode = Column(String(50), nullable=True, default=None, comment='模式ID')
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								    acquisitionType = Column(String(10), nullable=True, default=None, comment='采集方式')
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								    ac_target = Column(String(5), nullable=True, default=None, comment='采集目标')
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								    ds_ids = Column(String(50), nullable=True, default=None, comment='任务Id')
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								    ds_types = Column(String(5), nullable=True, default=None, comment='ds任务类型')
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								    schId = Column(String(50), nullable=True, default=None, comment='调度id')
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