@A_smart_kitten @Pppery: I splited this task, changed title and Description

T412444 The reasons for not implementing a namespace filter in LinkSearch are no longer valid.
The table structure has changed fundamentally since 2007, and SQL databases can now handle text better.

@Pppery : I think this can be divided into two parts. The first is the addition of a namespace filter to LinkSearch. This is low-hanging fruit and helps users significantly.

T12593 dates back to 2007 and was imported from the good old Bugzilla.

After clicking on Quelltext bearbeiten, there is no console output.

Does accessing https://de.wikipedia.org/w/index.php?title=Benutzer:ⵓ/test.js&action=edit&debug=true directly work for you?

With this Quarry (https://quarry.wmcloud.org/query/78127 ), I found ~ 10000 broken URL in enwiki.

In article [[de:Ustym_Karmaljuk]] is a none existing URL http://. in the table.

usenet links could be test cases: [[:en:Linux]]