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 hoscd_businessid = db.columns.Text(primary_key=True)
    hoscd_event_date=db.columns.Date(primary_key=True)
    hoscd_key=db.columns.Text(primary_key=True)
    hoscd_username=db.columns.Text(primary_key=True)
    hoscd_buid = db.columns.Text()
    hoscd_createdtime = db.columns.DateTime()
    hoscd_opid = db.columns.Text()
    hoscd_status = db.columns.Text()
    hoscd_type = db.columns.Text()
    hoscd_updatedtime = db.columns.DateTime()
    hoscd_value = db.columns.Blob()
    hoscd_valuetype = db.columns.Text()