Facet Search by Statistics Aggregation

Calculates statistics of attribute values: min, max, count, average, and sum.

General restrictions

The min, max, average, and sum values of aggregation operate on the double representation of the data. As a consequence, the result may be approximate when running on longs (fields with long type) whose absolute value is greater than 2^53.

Stats Aggregation

This type of aggregation calculates statistics of the attribute values min, max, count, average, and sum.

Table 1. Request Body Description
Parameter	Value	Required	Value Type
`fieldName`	Facet attribute (same as `facet` in basic facet request)	Yes	String
`facetType`	`stats`	Yes	ENUM

Response Format

The response contains:


Field	Type	Description
`count`	long	Amount of values.
`min`	double	Minimal value; not present if `count=0`.
`max`	double	Maximum value; not present if `count=0`.
`avg`	double	Average value; not present if `count=0`.
`sum`	double	Sum of values; not present if `count=0`.

Example

POST /api/{tenantId}/entities/_facets
                [
                {
                "fieldName": "attributes.height",
                "facetType": "stats"
                }
                ]

Response

{
  "attributes.height": {
    "count": 4,
    "min": 100.0,
    "max": 400.0,
    "avg": 202.5,
    "sum": 810.0
  }
}

Extended Stats Aggregation

The extended_stats aggregation is an extended version of the stats aggregation, where additional metrics are added such as the sum of squares, standard deviation (SD), variance, and SD bounds. In addition to stats aggregation, this can have input parameters.

By default, the extended_stats metric will return SD bounds, which provides an interval of plus/minus two standard deviations from the mean. If you want a different boundary, for example, three standard deviations, sigma can be specified as a request parameter.

Table 2. Input Parameters
Parameter	Value	Required	Value Type
`fieldName`	Facet attribute (same as `facet` in basic facet request)	Yes	String
`facetType`	`extended_stats`	Yes	ENUM
`sigma`		No	double

Response Format

The response contains:


Field	Type	Description
`count`	long	Amount of values.
`min`	double	Minimal value; not present if `count=0`.
`max`	double	Maximum value; not present if `count=0`.
`avg`	double	Average value; not present if `count=0`.
`sum`	double	Sum of values; not present if `count=0`.
`sum_of_squares`	double	Sum of squares; not present if `count=0`.
`variance`	double	Variance of SD; not present if `count=0`.
`std_deviation`	double	Standard deviation value; not present if `count=0`.
`std_deviation_upper_bound`	double	SD upper bound; not present if `count=0`.
`std_deviation_lower_bound`	double	SD lower bound; not present if `count=0`.

Example

POST /api/{tenantId}/entities/_facets
[
  {
    "fieldName": "attributes.height",
    "facetType": "extended_stats",
    "sigma": 3.0
  }
]

Response

{
 "attributes.height": {
   "count": 4,
   "min": 100.0,
   "max": 400.0,
   "avg": 202.5,
   "sum": 810.0,
   "sum_of_squares": 222100.0,
   "variance": 14518.75,
   "std_deviation": 120.49377577285891,
   "std_deviation_upper_bound": 443.4875515457178,
   "std_deviation_lower_bound": -38.48755154571782
 }
}

Min/Max/Sum/Avg/Count Aggregations

This type of aggregation is single value aggregation to find min/max/sum/avg value or amount of values.

Table 3. Request Body Description
Parameter	Value	Required	Value Type
`fieldName`	Facet attribute (same as `facet` in basic facet request)	Yes	String
`facetType`	One of the following: `min`, `max`, `sum`, `avg`, or `valueCount`	Yes	ENUM

Response Format

The response contains:

Table 4. Min Aggregation
Field	Type	Description
`min`	double	Minimal value; `null` if no data has matched.

Table 5. Max Aggregation
Field	Type	Description
`max`	double	Maximum value; `null` if no data has matched.

Table 6. Avg Aggregation
Field	Type	Description
`avg`	double	Average value; `null` if no data has matched.

Table 7. Sum Aggregation
Field	Type	Description
`sum`	double	Sum of values; `0` if no data has matched.

Table 8. Count Aggregation
Field	Type	Description
`count`	long	Count of values; `0` if no data has matched.

Example

POST /api/{tenantId}/entities/_facets
[
  {
    "fieldName": "attributes.height",
    "facetType": "min"
  }
]

Response

{
  "attributes.height": {
    "min": 100.0
  }
}

Response (in case no data has matched)

{
  "attributes.height": {}
}

Faceted Search

Multiple faceted search

Unify and manage your data

Facet Search by Statistics Aggregation

Stats Aggregation

Extended Stats Aggregation

Min/Max/Sum/Avg/Count Aggregations

Footer

Unify and manage your data

Facet Search by Statistics Aggregation

Stats Aggregation

Extended Stats Aggregation

Min/Max/Sum/Avg/Count Aggregations

Related Topics

Footer