How Does JIRA Handle JQL Functions?

If I have the below JQL, when it runs the function, is it running the function against all issues or just the ones that qualify on the other clause (project = CVA).

project = CVA AND issue in subtask("status != Closed") 


I'm trying to figure out if functions performs better if there is additional clauses, like the example above that is filtering by project.

 

 

 

 

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It is running against all issues. JIRA runs every clause and then does the AND/OR on the result set.Following should perform better!

issue in subtask("status != Closed AND project = CVA")

 

 

By “JIRA runs every clause and then does the AND/OR”, do you mean that the following would return three separate result sets to be analyzed by the query engine: project = “CVA” AND status != closed AND summary ~ “migrate” Or is this how JQL conceptually works, but in truth it has an optimizer that recognizes a more efficient execution plan? Is there a whitepaper or URL that you can reference for more information on how JIRA executes JQL?

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