一、key pattern 查询相应的key (1)redis允许模糊查询key 有3个通配符 *、?、[] (2)randomkey:返回随机key (3)type key:返回key存储的类型 (4)exists key:判断某个key是否存在 (5)del key:删除key (6)rename key newkey:改名 (7)renamenx key newkey:如果newkey不存在则修改成功 (8)move key 1:将...
删除key $redis->delete('key1'); 成功返回1失败返回0 $redis->delete('key1','key2'); 删除两个键成功返回1失败返回0查询生存时间 $redis->ttl('key1'); 持久化的返回-1,有生存时间的返回时间(单位秒)同时给多个key赋值,同时设置key0和key1 $redis->mset(array('key0' => 'value0', 'key1'...
Redis+keys(pattern: str) : List[str]+delete(keys: List[str]) : intKeyCleaner- redis: Redis+cleanKeys(prefix: str) : void 流程图 下面是一个流程图,展示了清除以指定字符开头的key的实现流程: Keys FoundNo Keys FoundStartConnectRedisFindKeysDeleteKeysEndDeleteSuccess 通过本文的介绍,你学习了如何在...
getrange(key,start,end) 获取指定键名对应值从start到end位置的字符串 (GETRANGE 命令在 Redis 2.0 之前的版本里面被称为 SUBSTR 命令) Redistemplate字符串操作 set(key, value) 设置键值对 get(key) 获取键值对 getAndSet(key,value) 获取并更新键的值 multiGet(keys) 批量获取值 setIfAbsent( key, value...
DEL key NX的作用 NX参数是为了保证当分布式锁不存在时,只有一个client能写入次key成功,获取到锁。 分布式锁的第一核心要素就是互斥性、安全性,在同一时间内,不允许多个client同时获得锁 未设置key的自动过期时间 分布式锁的第二个核心要素,活性。在实现分布式锁的过程中要考虑到client可能会出现crash或者网络分区,...
ZRANGE key start stop [WITHSCORES] 例如: > ZRANGE myset 0 -1 WITHSCORES 1) "one" 2) "1" 3) "two" 4) "2" 5) "three" 6) "3" 7) "four" 8) "4" 9) "five" 10) "5" ZREVRANGE 按照排名(从大到小)获取指定范围内的成员。
del, delete, unlink - Delete a key dump - Return a serialized version of the value stored at the specified key. exists - Determine if a key exists expire, pexpire - Set a key's time to live in seconds expireAt, pexpireAt - Set the expiration for a key as a UNIX timestamp keys - ...
r.delete(key) result_length +=1 print"normal ways end at:",time.time() - start_time print"normal ways delete numbers:",result_length defdel_keys_with_pipe(): start_time = time.time() result_length = pipe = r.pipeline() forkeyinr.scan_iter(match='dba_*',count=5000): ...
* EXPIRE_AVOID_DELETE_EXPIRED flag. * * The return value of the function is 0 if the key is still valid, * otherwise the function returns 1 if the key is expired. */intexpireIfNeeded(redisDb*db,robj*key,intflags){if(server.lazy_expire_disabled)return0;// 判断是否开启惰性删除/** ...
dbAdd()and its higher level counterpartsetKey()create a new key in a Redis database. dbDelete()removes a key and its associated value. emptyData()removes an entire single database or all the databases defined. The rest of the file implements the generic commands exposed to the client. ...