Large Object support

Are there any plans to have direct support for large objects for efficient streaming of data?

My use case: my webapp supports uploads of binary data files. These files are stored with TOAST (bytea) which is fine: these files are not directly downloaded via the app, and even if they were, we're talking 10s of MB, so I'm not worried about memory footprint for an individual record. HOWEVER, part of the requirements for this app is that all these files can be downloaded in a single zip file. This can be 100s of MBs. My plan: kickoff a background task that builds the zip file, then stores the zip file in PG as a large object. The question then is: providing an efficient download via my webapp (aiohttp).

I could stream it with a loop around, e.g.:

SELECT lo_get(data_oid, :offset, :chunksize) from zipstorage where id = :id

where chunksize might be 1MB and offset increases by 1MB with each iteration, stopping the iteration when the returned data is < 1MB.

Might there be a more direct, efficient way? E.g., as with psycopg2's lobject?

Other suggestions most welcome.

Thanks!

该 issue 没有列出任何 asyncpg 文件、测试或入口点。先审查提议的 lo_get 循环和链接的 psycopg2 lobject 参考，然后确定可视为直接支持大对象的 API 范围和流式处理行为。