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indexes: Indexing Counters

  • To index counters, create a static index that inherits from AbstractCountersIndexCreationTask.

  • Auto-indexes for counters are not available at this time.

  • In this page:


In order to index counter values, create an index that inherits from AbstractCountersIndexCreationTask. Next, choose one of these two methods which take the index expression:

this.maps = new Set(["map"]);"map");

maps indexes all the counters in the indexed documents. addMap only indexes the counters with the specified name.

Examples of indexes using each method:

class MyCounterIndex extends AbstractCountersIndexCreationTask {
     constructor() {
        super(); = "counters.Companies.HeartRate.Select(counter => new {\n" +
            "    heartBeat = counter.Value,\n" +
            "    name = counter.Name,\n" +
            "    user = counter.DocumentId\n" +

Querying the Index

const companies = session
    .query({index: "Companies_ByCounterNames"})
    .containsAny("counterNames", ["Likes"])
let results = await companies.all();