I've been tasked with splitting several existing reports into two (one for one set of users, one for a different set) and while I was looking at using Linked Reports unfortunately the software program that actually does the pushing out of the reports to the end-users doesn't support Linked Reports.
There also doesn't seem to be a "Dependencies" link which would allow me to see what reports are dependent on the Sub report I've been asked to change.
Digging through various SQL examples that are out there there didn't seem to be anything to do exactly what I was after *without* making it unnecessarily complicated.
Here's the SQL I ended up with;
FROM (SELECT *,
WHEN LEFT(CONVERT(varbinary(max),Content),3) = 0xEFBBBF
END AS ContentXML
FROM Catalog C) AS C
WHERE C.ContentXML LIKE '%Subreport%'
AND C.ContentXML LIKE '%SUB_REPORT_NAME%'
AND C.Path LIKE '/SUB_REPORT_FOLDER/%'
The point of including the sub-report folder is to only pick up items in a single folder (or sub-folder) as we have PROD, DEV, and TEST all on the same server (in different folders).
Hope this saves you the time it took me sorting it out!