"""查询 auth.users 表的 CHECK 约束"""
import os
import psycopg2
from dotenv import load_dotenv

load_dotenv()
dsn = os.environ["APP_DB_DSN"]
conn = psycopg2.connect(dsn)
cur = conn.cursor()
cur.execute("""
    SELECT conname, pg_get_constraintdef(oid)
    FROM pg_constraint
    WHERE conrelid = 'auth.users'::regclass AND contype = 'c'
""")
for row in cur.fetchall():
    print(f"{row[0]}: {row[1]}")
conn.close()
