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Diffstat (limited to 'iredis/data/commands/pfmerge.md')
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diff --git a/iredis/data/commands/pfmerge.md b/iredis/data/commands/pfmerge.md new file mode 100644 index 0000000..90e1dc9 --- /dev/null +++ b/iredis/data/commands/pfmerge.md @@ -0,0 +1,22 @@ +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 (defaulting to an empty HyperLogLog). + +If the destination variable exists, it is treated as one of the source sets and +its cardinality will be included in the cardinality of the computed HyperLogLog. + +@return + +@simple-string-reply: The command just returns `OK`. + +@examples + +```cli +PFADD hll1 foo bar zap a +PFADD hll2 a b c foo +PFMERGE hll3 hll1 hll2 +PFCOUNT hll3 +``` |