HSET has multi-fields version HMSET, why not HINCRBY?

[dengchunping]

I met this issue, increase every fields in one hash by 1, but it takes me number of fields steps to finish it, since there is no HMINCRBY, hope there is one such command.

[AllenDou]

lua script can help you . see below:
EVAL "
for i = 1 , #KEYS do
redis.call('hincrby','key',KEYS[i],ARGV[i])
end " 3 f1 f2 f3 5 7 9
just a sample .

[antirez]

If you are proposing to make HINCRBY variadic: the difference is in the return value, when the original reply type makes sense in the variadic form, than a variadic form exists, otherwise it does not.

if you are proposing adding an HMINCRBY, we believe that with Lua scripting this should not be needed.

Anyway HMSET / HSET is an historical design error as HSET does nothing more than HMSET, you can replace HSET calls with HMSET and everything works. Probably HMSET will be deprecated in Redis 3.0 and made just an alias for the variadic HSET case.

Cheers,
Salvatore

[antirez]

There was this follow up on Hacker News: https://news.ycombinator.com/item?id=13832244