Aggregation
• com.exalead.search.v30.Aggregation
• Combines the values of the specified expr for all the hits of the group and output the value to the specified meta. For example, if you have hits:
◦ H1 with values: sort_field=100, group_field=12, value_field=57
◦ H2 with values: sort_field=50, group_field=12, value_field=23
With a sort by sort_field and a group by group_field, the GroupBy will only keep the hit H1 because its sort_field has the best value.
◦ with a function on value_field of type "MIN", the value of value_field in the grouped hit will be 23 (minimum value over grouped hits)
◦ with a function on value_field of type "MAX", the value of value_field in the grouped hit will be 57 (maximum value over grouped hits)
◦ with a function on value_field of type "SUM", the value of value_field in the grouped hit will be 80 (sum of values for grouped hits)
◦ with a function on value_field of type "AVG", the value of value_field in the grouped hit will be 40 (average of values for grouped hits)
• Parent elements:
◦ com.exalead.search.v30.GroupConfig (as GroupConfig)
• Attributes:
Name | Type | Default value | Description |
|---|
expr | string | | Field to compute on the grouped hits. |
aggregationField | string | | |
function | enum(AVG, MAX, MIN, SUM, STDDEV, CONCAT) | MAX | Aggregation function to apply on the specified expression. • MIN/MAX use the lowest/highest value of all hits in the group • SUM adds the values of all hits in the group • AVG calculates the mean of values of all hits in the group • STDDEV calculates the standard deviation of values of all hits in the group • CONCAT joins all the values from all the hits in the group. Only works with alphanumerical values. |
separator | string | | Character to separate concatenated strings. |