allow iterating over custom number of records with asyncpg

[databasedav]

addresses #413, but only for postgres with asyncpg, passing n in the kwargs to .iterate will error for the other drivers, i can add them eventually if that's a requirement to get this merged

• asyncpg
• tests
• other drivers
• documentation

[aminalaee]

@databasedav Thank you for this.
yes, I think the idea is to have the same thing for all backends.
And you can also add documentation to your checklist.

[databasedav]

looks like some of the backends might not be breaking out of the while fetchmany loop, @aminalaee can you please disable the github actions, i'll comment once i figure the others out, thanks

[aminalaee]

@databasedav I've cancelled the previous actions, if that's what you mean. But I can't disable them in the project.
Sure, take your time and fix them in your local.

[databasedav]

@aminalaee yup that's what i meant, thanks again

[aminalaee]

Any update with this?

[databasedav]

i was having issue with running these concurrently, i think it was related to the transaction issues mentioned in the repo, i am now just using sqlalchemy since it has asyncpg support