I found a problem while using the JQL to filter sub-task issues with Story Points by the parent.
The problem is if my JQL is like this:

project = Marketing and issuetype = "Technical task"  order by "Story Points"

The Story Point Column will show as you can see in the JQL_1.jpg

But if my JQL is like this:

project = Marketing and issuetype = "Technical task" and parent="MKT-2" order by "Story Points"

The Story Point Column will not show as you can see in the JQL_2.jpg

The Issue Type Technical task have Story Point Custom Field associated with the create screen.
This issue type it's a sub-task from the parent issue type Story. e.g.: MKT-2 in the pictures.

I think with and without parent set in the JQL the Story Point need to show up.
The Story Point column was add in Administration >> Issue Fields >> Navigator Columns, too.