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Data Mapping


Statsig requires certain data schema in order for proper processing. We support 3 different types of datasets to be ingested into our platform:

  1. Custom Events
  2. Precomputed Metrics
  3. Exposure Events (Coming Soon)

During setup, we will ask you to map columns in your data output to fields Statsig expects and run a small sample query to make sure that there aren't any basic issues with data types, the mapping, or the base query itself.

Please note that we will cast fields into the appropriate type. For example, Statsig accepts String IDs, but it's okay to leave an ID field as an integer.

Custom Events

Events that are emitted by your application to measure the ongoing impact of your features and experiments.


time_stampThe unix time your event was logged atBIGINT. please cast timestamps into timezoneless unix time
event_nameThe name of the eventSTRING/VARCHAR. Not null. Length < 128 characters
unit_idUnique unit identifierSTRING/VARCHAR. User ID, Stable ID, etc. The same event row can have multiple IDs


event_valueThe value of the eventSTRING/VARCHAR. Length < 128 characters. Statsig will detect numeric values
event_metadataMetadata columns about the event(MANY) STRING:STRING. Statsig will generate a metadata json field from however many metadata columns you provide
metadata_jsonMetadata json about the eventJSON STRING. Statsig will unpack this json 1 level deep. Nested values will be stored as strings

Precomputed Metrics

Precomputed metrics are a powerful way to leverage statsig for experiment results. Use these to send complex metrics and metrics that require delays due to attribution windows or long baking periods.

Precomputed metrics in statsig are expected to be calculated at a user-day granularity.


unit_idThe unique user identifier this metric is for. This might not necessarily be a user_id - it could be a custom_id of some kindSTRING
id_typeThe id_type the unit_id represents.STRING. A valid ID type from your project
dateDate of the daily metricDATE or ISOFORMATTED STRING. The date of the metric value for the unit_id provided
metric_nameThe name of the metricSTRING (Not null). Length < 128 characters
metric_valueA numeric value for the metricDOUBLE/NUMERIC. Metric value
Both of numerator/denominator need to be provided for Statsig to process the metric.
numeratorNumerator for metric calculationDOUBLE/NUMERIC. If present along with a denominator in any record, the metric will be treated as ratio and only calculated for users with non-null denominators.
denominatorDenominator for metric calculationDOUBLE/NUMERIC. If present along with a numerator in any record, the metric will be treated as ratio and only calculated for users with non-null denominators.

Exposure Events

Coming Soon