app/oneshot/backfill_email_log.py

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#!/usr/bin/env python3
from sqlalchemy import func
from app.models import Alias
from app.db import Session
max_alias_id = Session.query(func.max(Alias.id)).scalar()
step = 1000
el_query = "SELECT alias_id, MAX(id) from email_log where alias_id>=:start AND alias_id < :end GROUP BY alias_id"
alias_query = "UPDATE alias set last_email_log_id = :el_id where id = :alias_id"
updated = 0
for batch_start in range(0, max_alias_id, step):
rows = Session.execute(el_query, {"start": batch_start, "end": batch_start + step})
for row in rows:
Session.execute(alias_query, {"alias_id": row[0], "el_id": row[1]})
Session.commit()
updated += 1
print(f"\rAlias {batch_start}/{max_alias_id} {updated}")
print("")