Use case
Return the sum the values of a specific field from the issues returned by a JQL query.
Expression
Create and configure a Smart field using this expression in General parsing mode:
%{sum(fieldValue({issue.cfnnnnn},issuesFromJQL("project = DEMO and 'fieldName' is not empty")))}
Please, replace nnnnn in the above expression with the ID of the Number custom field and fieldName with its name. Additionally, replace the DEMO project key with the corresponding project key of your project
This expression can be customized to limit the issues from which the values are obtained by modifying the JQL query in the issuesFromJQL() parser function.
