Trait redis_driver::HyperLogLogCommands

pub trait HyperLogLogCommands {
    fn pfadd<K, E, EE>(
        &mut self,
        key: K,
        elements: EE
    ) -> PreparedCommand<'_, Self, bool>
    where
        Self: Sized,
        K: Into<BulkString>,
        E: Into<BulkString>,
        EE: SingleArgOrCollection<E>,
    { ... }
    fn pfcount<K, KK>(&mut self, keys: KK) -> PreparedCommand<'_, Self, usize>
    where
        Self: Sized,
        K: Into<BulkString>,
        KK: SingleArgOrCollection<K>,
    { ... }
    fn pfmerge<D, S, SS>(
        &mut self,
        dest_key: D,
        source_keys: SS
    ) -> PreparedCommand<'_, Self, ()>
    where
        Self: Sized,
        D: Into<BulkString>,
        S: Into<BulkString>,
        SS: SingleArgOrCollection<S>,
    { ... }
}

A group of Redis commands related to HyperLogLog

See Also

Redis Hash Commands

Provided Methods

fn pfadd<K, E, EE>(
    &mut self,
    key: K,
    elements: EE
) -> PreparedCommand<'_, Self, bool>where
    Self: Sized,
    K: Into<BulkString>,
    E: Into<BulkString>,
    EE: SingleArgOrCollection<E>,

Adds the specified elements to the specified HyperLogLog.

Return

• true if at least 1 HyperLogLog inFternal register was altered.
• false otherwise.

See Also

https://redis.io/commands/pfadd/

fn pfcount<K, KK>(&mut self, keys: KK) -> PreparedCommand<'_, Self, usize>where
    Self: Sized,
    K: Into<BulkString>,
    KK: SingleArgOrCollection<K>,

Return the approximated cardinality of the set(s) observed by the HyperLogLog at key(s).

Return

The approximated number of unique elements observed via PFADD.

See Also

https://redis.io/commands/pfcount/

fn pfmerge<D, S, SS>(
    &mut self,
    dest_key: D,
    source_keys: SS
) -> PreparedCommand<'_, Self, ()>where
    Self: Sized,
    D: Into<BulkString>,
    S: Into<BulkString>,
    SS: SingleArgOrCollection<S>,

Merge N different HyperLogLogs into a single one.

See Also

https://redis.io/commands/pfmerge/

Implementors

impl HyperLogLogCommands for Client

impl HyperLogLogCommands for MultiplexedClient

impl HyperLogLogCommands for Pipeline

impl HyperLogLogCommands for Transaction