AggregationGroup

Groups by one calendar part of the field's instant in timeZone, such as the weekday or the hour, so records from different days fall into one bucket. Keys are integers from AggregationDatePart's fixed domain; dense fills every key of that domain that has no records with the empty value of each metric.

Buckets the numeric value of field, or of expression when the group names one instead.

Groups by the value of field, or of expression when the group names one instead.

The grouped field; null only for a TERMS or HISTOGRAM group whose input is an expression.

The computed input of a TERMS or HISTOGRAM group in place of its field, or null.

Where field is read when the query expands elements: null (the innermost element, relative to its container) or AggregationGroupScope.ROOT (a root field, by its absolute path), so a count of elements can be grouped by a field of the record they belong to, such as its creation day. Without elements both read the root.