Should provide flags for redis 6

[TheCycoONE]

I've noticed that the list of flags returned in the 7th value of COMMAND for cl.throttle in redis 6.x is empty. I think @Write and @fast apply.

This may be related to issues I'm having with redis-cell and lettuce on redis 6, but I'm not sure: redis/lettuce#1327

I'm not able to determine from the documentation what the new flag list is; so if anyone knows that would be helpful; otherwise I'll update this ticket when I find out:

 72) 1) "cl.throttle"
     2) (integer) -1
     3) 1) write
     4) (integer) 0
     5) (integer) 0
     6) (integer) 0
     7) (empty array)

[brandur]

Interesting — I hadn't taken much of a look at Redis 6 yet, and this is the first time I've seen these flags.

There's no documentation about them in COMMAND, but they do appear in the example run near the bottom of the page. They do get a brief mention in code that suggests they're used for ACL categorization.

I'm not sure there's much that can be done for redis-cell though. The exported CreateCommand API from Redis for Modules still only takes the original arguments, and I couldn't find a new version of it. I suspect that this is a relatively new feature that is not supported for Redis Modules yet, and not even well-described in the core yet.

[TheCycoONE]

Yes, I noticed due to the linked bug in lettuce handling empty arrays, but wasn't able to find more information. I originally confused them with the flags under 3 when I opened the ticket; and backtracked when I found you were already providing those and it didn't help.

There's some mention of a new module api in an early announcement about 6 but I couldn't find anything about that either. I'll ask around.