Aggregations

Aggregations are specifications of processing that should happen on the various metrics available in Druid. Available aggregations are detailed below.

• longSum – This computes the sum of values as a 64-bit, signed integer. An example spec is

  {"type" : "longSum", "name" : "imps, "fieldName" : "impressions"}

  • fieldName is the name of the metric column to sum over and
  • name is the output name for the summed value.
• doubleSum – Same as “longSum” except the result is a 64-bit floating point.
• count – Computes the row count that match the filters
• min – Finds the minimum metric value
• max – Finds the maximum metric value