Share connections from a pool with different databases in the same PG server

When we are using TLS connections to a PG server the cost to keep opened multiple connections to different databases is high. So I'd like to implement database switching to share the connections from a pool with different databases.

pool = await asyncpg.create_pool(database='postgres')

async def handle(queries):
    """Handle incoming queries."""

    results = defaultdict(list)

    for dbname, dbqueries in queries.items():
        async with pool.acquire() as connection:

            connection.set_database(dbname)  # I want this !!!

            async with connection.transaction():
                for query in dbqueries:
                    result = await connection.execute(query)
                    results[dbname].append(result)

Is it feasible with asyncpg?

检查 asyncpg 的池和连接入口点，然后核对 PostgreSQL 的连接和数据库语义。该 issue 未指定文件或测试；要视为完成，需要维护者确认的范围，以及一个用于在多个数据库之间共享池化连接的可复现验收案例。