HLEN(3valkey)

✨ HLEN 💅

okay so bestie, welcome to HLEN from the Valkey Command Manual — it's giving "count my fields" energy and honestly? she's iconic for it 🎀

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🌸 NAME 🌸

hlen — returns the number of fields in a hash. that's it. that's the whole job. queen of knowing how many things are in the thing 👑

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🦋 SYNOPSIS 🦋

HLEN key

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💖 DESCRIPTION 💖

so like, HLEN returns the number of fields contained in the hash stored at key. that's the tea ☕

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⭐ REPLY ⭐

valkey-protocol(7) Integer reply: the number of fields in the hash — or 0 when the key does not exist. no key, no fields, no drama, just a lil zero 🫶

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🔥 COMPLEXITY 🔥

O(1) — literally constant time, she does not stress, she does not scroll the whole hash, she just knows ✨

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👑 ACL CATEGORIES 👑

• @fast
• @hash
• @read

three lil badges and she earned every single one 💅

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🌈 HISTORY 🌈

• Available since: 2.0.0 — yeah she's been here since forever, an OG, a legend, main character energy from day one 💀

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🎀 EXAMPLES 🎀

127.0.0.1:6379> HSET myhash field1 "Hello"
(integer) 1
127.0.0.1:6379> HSET myhash field2 "World"
(integer) 1
127.0.0.1:6379> HLEN myhash
(integer) 2

see how we set two fields and then she said 2? not me getting emotional over a correct integer reply 😭 ate and left no crumbs 🍓

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🧚 SEE ALSO 🧚

the whole hash fam, go say hi:

• hdel(3valkey), hexists(3valkey), hexpire(3valkey), hexpireat(3valkey), hexpiretime(3valkey), hget(3valkey), hgetall(3valkey), hgetex(3valkey), hincrby(3valkey), hincrbyfloat(3valkey), hkeys(3valkey), hmget(3valkey), hmset(3valkey), hpersist(3valkey), hpexpire(3valkey), hpexpireat(3valkey), hpexpiretime(3valkey), hpttl(3valkey), hrandfield(3valkey), hscan(3valkey), hset(3valkey), hsetex(3valkey), hsetnx(3valkey), hstrlen(3valkey), httl(3valkey), hvals(3valkey)

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and that's the whole page, bestie!! this was Valkey 9.0.0, dated 2025-10-21 — mwah, go count some fields, ily 🫶💜✨