HLEN

Syntax text Syntax diagram API methods

HLEN key

Client:

hlen(
    name: str
) → Union[Awaitable[int], int]

HLEN(
    key: RedisArgument
) → Any

hlen(
    key: byte[]
) → long  // The number of entries (fields) contained in the hash stored at key. If the specified key does not exist, 0 is returned assuming an empty hash.

hlen(
    key: String
) → long  // The number of entries (fields) contained in the hash stored at key. If the specified key does not exist, 0 is returned assuming an empty hash.

hlen(
    key: K  // the key.
) → Long  // Long integer-reply number of fields in the hash, or 0 when key does not exist.

hlen(
    key: K  // the key.
) → RedisFuture<Long>  // Long integer-reply number of fields in the hash, or 0 when key does not exist.

hlen(
    key: K  // the key.
) → Mono<Long>  // Long integer-reply number of fields in the hash, or 0 when key does not exist.

HLen(
    ctx: context.Context,
    key: string
) → *IntCmd

HashLength(
    key: RedisKey,  // The key of the hash.
    flags: CommandFlags  // The flags to use for this operation.
) → long  // The number of fields in the hash, or 0 when key does not exist.

HashLength(
    key: RedisKey,  // The key of the hash.
    flags: CommandFlags  // The flags to use for this operation.
) → long  // The number of fields in the hash, or 0 when key does not exist.

HashLength(
    key: RedisKey,  // The key of the hash.
    flags: CommandFlags  // The flags to use for this operation.
) → long  // The number of fields in the hash, or 0 when key does not exist.

HashLength(
    key: RedisKey,  // The key of the hash.
    flags: CommandFlags  // The flags to use for this operation.
) → long  // The number of fields in the hash, or 0 when key does not exist.

hlen(
    $key: string
) → int

hlen(
    key: K
) → (usize)

hlen(
    key: K
) → (usize)

Available since:: Redis Open Source 2.0.0
Time complexity:: O(1)
ACL categories:: @read, @hash, @fast,
Compatibility:: Redis Software and Redis Cloud compatibility

Returns the number of fields contained in the hash stored at key.

Required arguments

key

The name of the key that holds the hash.

Examples

Redis Software and Redis Cloud compatibility

Redis Software	Redis Cloud	Notes
✅ Standard ✅ Active-Active	✅ Standard ✅ Active-Active

Return information

RESP2 RESP3

Integer reply: the number of fields in the hash, or 0 when the key does not exist.