Commandszadd_subquery
ZADDS (subquery)
Apply for Redis Developer Course
|
Redis Regular Inspection / Technical Support
|
Redis Enterprise Server
|
|---|
Subquery feature
You can put a subquery in the member argument.
Commands allowed as a subquery: GET, MGET, LPOP, RPOP, LRANGE,
SMEMBERS, SUNION, SINTER, SDIFF, ZRANGE, ZREVRANGE,
HGET, HMGET, HKEYS, HVALS, HGETALL, LS.
In most cases the score is 0, so members are sorted by member.
Example
| Command> | set key Hello |
| Result> | OK |
| Command> | zadds zset1 (get key) |
| Result> | 1 |
| Command> | zrange zset1 0 -1 withscores |
| Result> | 1) "Hello" 2) "0" |
- You can load multiple values using various subquery commands.
- Useful when you want to sort LIST or SET members.
- ZRANGE and ZREVRANGE with withscores can supply scores.
- LS with memory sorts by memory so you can find keys that use a lot of RAM. LS with len finds keys with many or few members.
Example
| Command> | zadds zset1 (lrange mylist2 0 -1) |
| Result> | 8 |
| Command> | zadds zset1 (sunion myset1 myset2) |
| Result> | 7 |
| Command> | zadds zset1 (zrange myzset1 0 -1) |
| Result> | 6 |
| Command> | zadds zset1 (zrange myzset2 0 -1 withscores) |
| Result> | 6 |
| Command> | zadds zset1 (hmget myhash1 field1 field2) |
| Result> | 2 |
| Command> | zadds zset1 (ls * memory) |
| Result> | 2 |
| Command> | zadds zset1 (ls * len) |
| Result> | 2 |
| Command> | zadds zset1 (ls * zset memory) |
| Result> | 2 |
| Available since Enterprise version 7.2.5. |
Automatic member expire
It also works with a subquery.
Example
| Command> | zadds myzset (get key) ex 10 |
| Result> | 1 |
| Command> | zadds myzset (lrange mylist 0 -1) ex 10 |
| Result> | 10 |
Syntax
ZADDS key (subquery) [ex seconds]
- Available since Enterprise version 7.2.5.
- Time complexity depends on the subquery.
| << ZADD | ZADDS | ZINCRBY >> |
|---|
Email
답글이 올라오면 이메일로 알려드리겠습니다.
