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Cluster cluster addslots(集群 槽位) cluster count failure reports(集群計(jì)數(shù)失敗報(bào)告) cluster countkeysinslot cluster delslots cluster failover cluster forget cluster getkeysinslot cluster info cluster keyslot(集群鍵槽) cluster meet cluster nodes(集群節(jié)點(diǎn)) cluster replicate(集群復(fù)制) cluster reset(集群重置) cluster saveconfig cluster set config epoch cluster setslot cluster slaves cluster slots readonly readwrite Connection auth echo ping quit select swapdb Geo geoadd geodist geohash geopos georadius georadiusbymember Hashes hdel hexists hget hgetall hincrby hincrbyfloat hkeys hlen hmget hmset hscan hset hsetnx hstrlen hvals HyperLogLog pfadd pfcount pfmerge Keys del dump exists expire expireat keys migrate move object persist pexpire pexpireat pttl randomkey rename renamenx restore scan sort touch ttl type unlink wait Lists blpop brpop brpoplpush lindex linsert llen lpop lpush lpushx lrange lrem lset ltrim rpop rpoplpush rpush rpushx Pub/Sub psubscribe publish pubsub punsubscribe subscribe unsubscribe Scripting eval evalsha script debug script exists script flush script kill script load Server bgrewriteaof bgsave client getname client kill client list client pause client reply client setname command command count command getkeys command info config get config resetstat config rewrite config set dbsize debug object debug segfault flushall flushdb info lastsave monitor role save shutdown slaveof slowlog time Sets sadd scard sdiff sdiffstore sinter sinterstore sismember smembers smove spop srandmember srem sscan sunion sunionstore Sorted Sets zadd zcard zcount zincrby zinterstore zlexcount zrange zrangebylex zrangebyscore zrank zrem zremrangebylex zremrangebyrank zremrangebyscore zrevrange zrevrangebylex zrevrangebyscore zrevrank zscan zscore zunionstore Strings append bitcount bitfield bitop bitpos decr decrby get getbit getrange getset incr incrby incrbyfloat mget mset msetnx psetex set setbit setex setnx setrange strlen Transactions discard exec multi unwatch watch
characters

GEODIST key member1 member2 [unit]

自3.2.0起可用。

時(shí)間復(fù)雜度: O(log(N))

返回排序集合表示的地理空間索引中兩個(gè)成員之間的距離。

給定一個(gè)表示地理空間索引的有序集合,該集合使用 GEOADD 命令填充,該命令返回指定單元中兩個(gè)指定成員之間的距離。

如果一個(gè)或兩個(gè)成員都缺失,則該命令返回 NULL 。

該單位必須是以下之一,并且默認(rèn)為米:

  • m 為米。

  • km 為千米。

  • mi 為英里。

  • ft 為英尺。

假設(shè)地球是一個(gè)完美的球體,計(jì)算距離,因此在邊緣情況下可能出現(xiàn)高達(dá)0.5%的誤差。

返回值

批量字符串回復(fù),具體為:

該命令以指定單位的雙精度值(以字符串表示)返回距離,如果缺少一個(gè)或兩個(gè)元素,則返回 NULL 。

例子

redis>  GEOADD Sicily 13.361389 38.115556 "Palermo" 15.087269 37.502669 "Catania" (integer) 2 

redis>  GEODIST Sicily Palermo Catania "166274.1516" 

redis>  GEODIST Sicily Palermo Catania km "166.2742" 

redis>  GEODIST Sicily Palermo Catania mi "103.3182" 

redis>  GEODIST Sicily Foo Bar (nil)

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