Unknown SDK


Merges multiple HyperLogLog data structures into an unique HyperLogLog structure stored at key, approximating the cardinality of the union of the source structures.

[Redis documentation]

pfmerge(key, sources, [options], callback)

Arguments Type Description
key string Destination key identifier
sources string List of HyperLogLog source key identifiers
options JSON Object Optional parameters
callback function Callback


Option Type Description Default
queuable boolean Make this request queuable or not true

Callback Response

Returns null if successful.


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// Using callbacks (NodeJS or Web Browser)
kuzzle.memoryStorage.pfmerge('key', ['key1', 'key2', '...'], function (err) {
  // callback called once the action has completed
// Using promises (NodeJS only)
kuzzle.memoryStorage.pfmergePromise('key', ['key1', 'key2', '...'])
  .then(() => {
    // resolved once the action has completed