Strings

String commands for storing and manipulating text and binary data.

Commands

Command	Syntax	Description
GET	GET key	Get value of key
SET	SET key value [EX s] [PX ms] [NX|XX]	Set value with optional expiration
MGET	MGET key [key ...]	Get values of multiple keys
MSET	MSET key value [key value ...]	Set multiple key-value pairs
INCR	INCR key	Increment integer value by 1
INCRBY	INCRBY key increment	Increment by integer amount
INCRBYFLOAT	INCRBYFLOAT key increment	Increment by float amount
DECR	DECR key	Decrement integer value by 1
DECRBY	DECRBY key decrement	Decrement by integer amount
APPEND	APPEND key value	Append to existing value
STRLEN	STRLEN key	Get string length
GETRANGE	GETRANGE key start end	Get substring
SETRANGE	SETRANGE key offset value	Overwrite part of string
SETNX	SETNX key value	Set only if not exists
SETEX	SETEX key seconds value	Set with expiration in seconds
PSETEX	PSETEX key milliseconds value	Set with expiration in milliseconds

Examples

Basic SET/GET

127.0.0.1:6379> SET name "Alice"
OK
127.0.0.1:6379> GET name
"Alice"

SET with Expiration

# Expires in 60 seconds
127.0.0.1:6379> SET session:abc "user_data" EX 60
OK

# Expires in 5000 milliseconds
127.0.0.1:6379> SET temp "quick" PX 5000
OK

Conditional SET

# Only set if key doesn't exist (NX)
127.0.0.1:6379> SET lock:resource "owner_id" NX
OK
127.0.0.1:6379> SET lock:resource "other_owner" NX
(nil)  # Key already exists

# Only set if key exists (XX)
127.0.0.1:6379> SET counter "10" XX
OK  # Updates existing key

Counters

127.0.0.1:6379> SET views 0
OK
127.0.0.1:6379> INCR views
(integer) 1
127.0.0.1:6379> INCRBY views 10
(integer) 11
127.0.0.1:6379> DECR views
(integer) 10

Multiple Keys

127.0.0.1:6379> MSET key1 "value1" key2 "value2" key3 "value3"
OK
127.0.0.1:6379> MGET key1 key2 key3
1) "value1"
2) "value2"
3) "value3"

Library Mode (Rust)

use redlite::{Db, SetOptions};
use std::time::Duration;

let db = Db::open("mydata.db")?;

// Basic SET/GET
db.set("name", b"Alice", None)?;
let name = db.get("name")?;  // Some(b"Alice".to_vec())

// With TTL
db.set("session", b"data", Some(Duration::from_secs(60)))?;

// Conditional SET
db.set_opts("lock", b"owner", SetOptions::new().nx())?;
db.set_opts("counter", b"10", SetOptions::new().xx())?;

// Counters
db.incr("views")?;
db.incrby("views", 10)?;
db.decr("views")?;