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Query template instances

Early adopter

Templates is currently in beta testing and only available to customers via our Early Adopter program. For more information and to request to join the program, visit the Flexible data modeling group on the Cognite Hub.

You can query the template instances by using GraphQL. A query has these key sections:

  • A query intent (query MyQueryName {, or just { as a shorthand.
  • The query to run. For templates this is usually <type>Query, for example countryQuery with an optional alias, myAlias: countryQuery)
  • The query parameters. For example filter: {...} or limit: 1000.
  • The fields to return at a specified depth.

GraphQL example​

query myQuery {
  countryQuery {
    items {
      name
      demographics {
        populationSize
        growthRate
      }
      deaths {
        datapoints(limit: 100) {
          timestamp
          value
        }
      }
    }
    nextCursor
  }
  demographicsQuery(
    filter: {
      _and: [{ populationSize: { gte: 2 } }, { populationSize: { lte: 10 } }]
    }
  ) {
    items {
      populationSize
      growthRate
      metadata {
        key
        value
      }
    }
  }
}

Where:

  • The query intent is declared by myQuery.
  • The queries to run are countryQuery and demographicsQuery.
  • The parameters are Country:100 for the death time series data points, and the Demographics: filter of populationSize between 2 and 10.
  • The fields to return, for Country: items -> name, demographic -> populationSize, growthRate, etc.

For more information, see the GraphQL documentation.

Fields and parameters for queries​

For <type>Query you can use these fields and parameters:

  • Fields

    • items - the actual items to be returned
    • nextCursor - the next set of items that can be returned. You specify this for the next query.

  • Parameters

    • filter - the filter you want to provide. This is based on the fields in your data model.
    • cursor - the nextCursor from the previous query.
    • limit - the maximum number of items to return. To fetch more items, use a anew query using the nextCursor parameter (Default: 1000).

Filter types​

FieldFilterHow to use
Top level filtersAny_and{_and: [{...},{...}]}
_or{_or: [{...},{...}]}
PrimitivesStringeq{eq: "..."}
anyOfTerms{anyOfTerms: ["..."]}
Long/Int/Floateq{eq: ...}
lt{lt: ...} = less than
gt{gt: ...} = greater than
lte{lte: ...} = less than or equals
gte{gte: ...} = greater than or equals
BooleanN/AN/A
CDF resourcesAssetN/AN/A
TimeSeriesN/AN/A
SyntheticTimeSeriesN/AN/A
SequenceN/AN/A
FileN/AN/A
EventN/AN/A

Query fields for CDF types​

The sections below, describe the fields you can specify under type when querying built-in CDF types.

For example, Asset -> MetadataItem has the fields key and value that you can specify in your query:

# ...
  asset {
    metadata{
      key
      value
    }
  }
# ...

Common for all resource types​

type MetadataItem {
  key: String
  value: String
}

Time series​

type DatapointString implements Datapoint {
  timestamp: Long!
  value: Float
  stringValue: String
}

type DatapointFloat implements Datapoint {
  timestamp: Long!
  value: Float
}

type DatapointInt {
  timestamp: Long!
  value: Int
}

type AggregationResult {
  average: [DatapointFloat]
  max: [DatapointFloat]
  min: [DatapointFloat]
  count: [DatapointInt]
  sum: [DatapointFloat]
  interpolation: [DatapointFloat]
  stepInterpolation: [DatapointFloat]
  continuousVariance: [DatapointFloat]
  discreteVariance: [DatapointFloat]
  totalVariation: [DatapointFloat]
}

type TimeSeries {
  id: Long
  name: String
  metadata: [MetadataItem]
  description: String
  externalId: String
  isString: Boolean
  isStep: Boolean
  unit: String
  datapoints(start: Long, end: Long, limit: Int! = 100): [Datapoint]
  aggregatedDatapoints(
    start: Long
    end: Long
    limit: Int! = 100
    granularity: String!
  ): AggregationResult
  latestDatapoint: Datapoint
}

Synthetic time series​

type SyntheticTimeSeries {
  name: String
  metadata: [MetadataItem]
  description: String
  isStep: Boolean
  unit: String
  datapointsWithGranularity(
    start: Long
    end: Long
    limit: Int! = 100
    granularity: String
  ): [Datapoint]
  datapoints(start: Long, end: Long, limit: Int! = 100): [Datapoint]
}

Assets​

type Asset {
  id: Long!
  externalId: String
  name: String!
  description: String
  root: Asset
  parent: Asset
  source: String
  metadata: [MetadataItem]
}

Files​

type File {
  id: Long!
  externalId: String
  name: String!
  directory: String
  mimeType: String
  source: String
  metadata: [MetadataItem]
  dataSetId: Long
  assets: [Asset]
  sourceCreatedTime: Long
  sourceModifiedTime: Long
  uploaded: Boolean!
  uploadedTime: Long
  createdTime: Long!
  lastUpdatedTime: Long!
  downloadUrl: String
}

Sequences​

type Sequence {
  id: Long!
  name: String
  description: String
  assetId: String
  externalId: String
  metadata: [MetadataItem]
  dataSetId: Long
  createdTime: Long!
  lastUpdatedTime: Long!
}

SDK documentation​