aggregatetimespent vs timespent Jira built in fields?

Question

I'm working with changelogs in Jira, and have noticed that there seem to be two different fields built in to Jira which deal with Time Spent, but I cannot find info on the differences. Could anyone explain to me how timespent is different from aggregatetimespent?

Based on what I'm seeing in the changelog, only timespent is used, but aggregatetimespent seems to have the same value in the current state of my Jira Issue.

Avery_z35ljo · Answer

public class AggregateTimeSpentSystemField
extends AbstractAggregateDurationSystemField

System field that displays the calculated aggregate time spent. This adds all sub-tasks values to its own values.

https://docs.atlassian.com/software/jira/docs/api/7.0.5/com/atlassian/jira/issue/fields/AggregateTimeSpentSystemField.html

Thomas Magny-Garcia · Answer

Hi @Michael Gruskin 
I guess aggregatetimespent is the field matching the sum of time spent for the issue and its sub-tasks.
If you don't use sub-tasks, aggregatetimespent will equal timespent. If you use them, aggregatetimespent should be upper.

Hope it helps !