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Query template instances

Deprecation

Templates is being superseded with the released data modeling capabilities. See Data modeling for more information.

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:

  • myQuery declares the query intent.
  • 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 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 key and value fields 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​

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