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TencentDB for Redis®
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    Strings Group

    Last updated: 2024-11-25 15:37:56
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    The standard architecture of Redis 2.8 and the standard and cluster architectures of Redis 4.0, 5.0, 6.2, and 7.0 support the following commands: append, bitcount, bitop, bitpos, decr, decrby, get, getbit, getrange, getset, incr, incrby, incrbyfloat, mget, mset, msetnx, psetex, setex, set, setbit, setnx, setrange, and strlen.
    The standard architecture of Redis 2.8 does not support the bitfield command, while Redis 4.0, 5.0, and 6.2 do.
    Redis 4.0 and 5.0 do not support the bitfield_ro, getdel, and stralgo commands.
    Versions 6.2 and 7.0 support the bitfield_ro, getdel, stralgo, and getex commands.
    In a cluster architecture, cross-slot access is applicable to the mget and mset commands other than the bitop and msetnx commands.
    The lcs command is introduced in version 7.0, with updates as detailed below.
    Command Group
    Command
    New Description
    String group
    SET key value [NX | XX] [GET] [EX seconds | PX milliseconds | EXAT unix-time-seconds | PXAT unix-time-milliseconds | KEEPTTL]
    New NX and GET parameters.
    NX: Represents Not exists and sets the key-value pair only if the key does not exist.
    GET: Sets a new value and returns the old value.
    BITPOS key bit [start [end [BYTE | BIT]]]
    New BYTE and BIT parameters that specify the unit of offset. BYTE: Represents the offset in bytes. BIT: Represents the offset in bits. The default value is BYTE.
    LCS key1 key2 [LEN] [IDX] [MINMATCHLEN min-match-len] [WITHMATCHLEN]
    A new command.
    Returns the longest common subsequence between two keys.
    The supported command details for each version are shown in the table below, where ✓ indicates support, x indicates not support, and - indicates that the command does not involve cross-slot access scenarios.
    Command
    2.8 Memory Edition (Standard Architecture)
    4.0 Memory Edition (Standard Architecture)
    4.0 Memory Edition (Cluster Architecture)
    5.0 Memory Edition (Standard Architecture)
    5.0 Memory Edition (Cluster Architecture)
    6.2 Memory Edition (Standard Architecture)
    6.2 Memory Edition (Cluster Architecture)
    7.0 Memory Edition (Standard Architecture)
    7.0 Memory Edition (Cluster Architecture)
    Memory Edition (Cluster Architecture) Cross-Slot Support
    append
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    bitcount
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    bitop
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    x
    bitpos
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    decr
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    decrby
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    get
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    getbit
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    getrange
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    getset
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    incr
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    incrby
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    incrbyfloat
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    mget
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    mset
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    msetnx
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    x
    psetex
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    setex
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    set
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    setbit
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    setnx
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    setrange
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    strlen
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    bitfield
    x
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    ✓
    -
    bitfield_ro
    x
    x
    x
    x
    x
    ✓
    ✓
    ✓
    ✓
    -
    stralgo
    x
    x
    x
    x
    x
    ✓
    ✓
    ✓
    ✓
    -
    getdel
    x
    x
    x
    x
    x
    ✓
    ✓
    ✓
    ✓
    -
    getex
    x
    x
    x
    x
    x
    ✓
    ✓
    ✓
    ✓
    -
    lcs
    x
    x
    x
    x
    x
    x
    x
    ✓
    ✓
    -
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