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"""Serialized DAG table in database."""

import hashlib
import logging
from datetime import datetime, timedelta
from typing import Any, Dict, List, Optional

import sqlalchemy_jsonfield
from sqlalchemy import BigInteger, Column, Index, String, and_
from sqlalchemy.orm import Session, backref, foreign, relationship
from sqlalchemy.sql import exists

from airflow.models.base import ID_LEN, Base
from airflow.models.dag import DAG, DagModel