HyperLogLogCommands
Related Doc:
package commands
Adds all the element arguments to the HyperLogLog data structure stored at specified key.
Adds all the element arguments to the HyperLogLog data structure stored at specified key.
the key of the HyperLogLog data structure
element(s) to add to the HyperLogLog data structure
true if at least one HyperLogLog internal register was altered, false otherwise
2.8.9
[[scredis.exceptions.RedisErrorResponseException]] if key is not of HyperLogLog type
The HyperLogLog data structure can be used in order to count unique elements in a set using just a small constant amount of memory, specifically 12k bytes for every HyperLogLog (plus a few bytes for the key itself). The returned cardinality of the observed set is not exact, but approximated with a standard error of 0.81%.
When called with a single key, returns the approximated cardinality computed by the HyperLogLog data structure stored at the specified variable, which is 0 if the variable does not exist.
When called with a single key, returns the approximated cardinality computed by the HyperLogLog data structure stored at the specified variable, which is 0 if the variable does not exist.
When called with multiple keys, returns the approximated cardinality of the union of the HyperLogLogs passed, by internally merging the HyperLogLogs stored at the provided keys into a temporary HyperLogLog.
key(s) of the HyperLogLog data structure to count
the approximate number of unique elements observed via PFADD
2.8.9
[[scredis.exceptions.RedisErrorResponseException]] if at least one key is not of HyperLogLog type
The HyperLogLog data structure can be used in order to count unique elements in a set using just a small constant amount of memory, specifically 12k bytes for every HyperLogLog (plus a few bytes for the key itself). The returned cardinality of the observed set is not exact, but approximated with a standard error of 0.81%.
Merge multiple HyperLogLog values into an unique value that will approximate the cardinality of the union of the observed Sets of the source HyperLogLog structures.
Merge multiple HyperLogLog values into an unique value that will approximate the cardinality of the union of the observed Sets of the source HyperLogLog structures.
The computed merged HyperLogLog is set to the destination variable, which is created if does not exist (defauling to an empty HyperLogLog).
the destination key where the result should be stored
keys of the HyperLogLog data structure to merge
2.8.9
[[scredis.exceptions.RedisErrorResponseException]] if at least one key is not of HyperLogLog type
The HyperLogLog data structure can be used in order to count unique elements in a set using just a small constant amount of memory, specifically 12k bytes for every HyperLogLog (plus a few bytes for the key itself). The returned cardinality of the observed set is not exact, but approximated with a standard error of 0.81%.
This trait implements hyperloglog commands.