As suggested by Simetrical on T9804: Namespace filter in Special:Linksearch, I'm opening a new bug to request the namespace filter to be activated for Special:Linksearch on Wikimedia wikis. As far as I understand, this feature needs to be more efficient to be activated (see T9804#125213). Thanks.
See Also:
| Subject | Repo | Branch | Lines +/- | |
|---|---|---|---|---|
| [schema] Add el_from_namespace column to support namespace filter | mediawiki/core | master | +84 -22 |
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Stalled | None | T120761 Improve Special:LinkSearch | |||
| Open | None | T12593 Make namespace filter in Special:Linksearch efficient enough for wgMiserMode | |||
| Resolved | • Springle | T86415 Adding externallinks.el_from_namespace on wmf databases |
The only way to make this efficient is to duplicate page namespace data into the link tables, which would be difficult at best to maintain.
I don't think that's something we want to do at the moment...
Bah. So many dupes due to Bugzilla's crap default search. This isn't a LATER bug any longer. As I noted in bug 19789, the API can do this easily. The UI should match. Re-opening!
ayg wrote:
Is this a case where the web UI needs to be fixed, or where the API needs to be fixed?
(In reply to comment #8)
Is this a case where the web UI needs to be fixed, or where the API needs to be
fixed?
The API has a namespace filter. The user interface does not. The user interface should be updated to include a namespace selector. Clarified bug summary accordingly.
The worst-case behavior of the database query is very bad as there's not a clean index to work on, hence it's disabled in miser mode.
ayg wrote:
Since Delta was asking about this in MediaWiki-General, a summary:
Delta tells me, though, that the thing people really want this for is to limit to the main namespace, or maybe to content namespaces. This is much less of a problem in practice than arbitrary namespace limitations. The real issue would be someone searching for all *.wikipedia.org links in Portal_talk or something. For real-world queries, limiting to content namespaces should only increase rows scanned by a fairly small fixed factor, probably less than ten. So that can be considered, IMO.
Has anything changed in the last few years? I was about to file an enhancement request for a namespace filter on Special:Linksearch but found this.
themfromspace wrote:
(In reply to Scott from comment #14)
Has anything changed in the last few years? I was about to file an
enhancement request for a namespace filter on Special:Linksearch but found
this.
I requested this change a year ago but it looks like nobody's working to add this.
Maybe this can be done the same way as gerrit 117373, by adding a el_from_namespace column
Change 163470 had a related patch set uploaded by Umherirrender:
Add el_from_namespace column to support namespace filter
Change 163470 had a related patch set uploaded (by Umherirrender):
Add el_from_namespace column to support namespace filter
Change 163470 abandoned by Umherirrender:
[schema] Add el_from_namespace column to support namespace filter
Reason:
No longer support for this one year old patch set
As mentioned some weeks ago, this patch set will not be moved to the release 1.27.
Feel free to copy, change and submit under your own name.
Well we do this for pagelinks and friends, so I don't see why we can't do this here.
Delta tells me, though, that the thing people really want this for is to limit to the main namespace, or maybe to content namespaces. This is much less of a problem in practice than arbitrary namespace limitations. The real issue would be someone searching for all *.wikipedia.org links in Portal_talk or something. For real-world queries, limiting to content namespaces should only increase rows scanned by a fairly small fixed factor, probably less than ten. So that can be considered, IMO.
That depends on the distribution of the data, and may or may not be true, depending on what types of pages the url is on. I don't think this is something that can be relied on.
Requested again recently at English Wikipedia: https://en.wikipedia.org/wiki/Wikipedia:Reliable_sources/Noticeboard#Link_searches
Looking around at past discussions and tickets it seems that the API already allows this, the DB table (index) can be expanded to include namespaces, and we're already providing the filtering in other similar Special pages. If someone could assist with this you would make many committed editors very happy.
The API only sort of allows it in miser mode: if you request 500 links, it'll fetch the next 500 regardless of namespace and then return to you only the ones that are in the selected namespace. In some cases, this means you'll get an empty list because none of the 500 were in the requested namespace.
A rough plan might be: