ZLEXCOUNT key min max
Available since: 2.8.9
Time complexity: O(log(N)) with N being the number of elements in the sorted set.
ACL categories:
@read
@sortedset
@fast
When all the elements in a sorted set are inserted with the same score, in order to force lexicographical ordering, this command returns the number of elements in the sorted set at key
with a value between min
and max
.
The min
and max
arguments have the same meaning as described for
ZRANGEBYLEX
.
Note: the command has a complexity of just O(log(N)) because it uses elements ranks (see ZRANK
) to get an idea of the range. Because of this there is no need to do a work proportional to the size of the range.
@return
@integer-reply: the number of elements in the specified score range.
@examples
redis> ZADD myzset 0 a 0 b 0 c 0 d 0 e
TBD
redis> ZADD myzset 0 f 0 g
TBD
redis> ZLEXCOUNT myzset - +
TBD
redis> ZLEXCOUNT myzset [b [f