Hello Wikidata community,

As mentioned in previous communications [1], we are continuing forward on the WDQS public graph split.

The next stage of our rollout is to change query.wikidata.org to point to the main graph (which can also be reached directly on query-main.wikidata.org), whereas the scholarly graph will be available on query-scholarly.wikidata.org.

Most queries should run fine on the appropriate graph (main vs scholarly), but for queries that must run across the full dataset, the queries must be (re)written to use SPARQL federation [2]. You can ask for help to rewrite your queries [3]. If you encounter issues please feel free to report a problem [4].

If you need more time to do the transition you can use the new legacy endpoint [5] (query-legacy-full.wikidata.org) which contains the full Wikidata graph, but is limited in terms of performance and availability. Please be mindful when using this legacy endpoint and use it only if really needed. This endpoint will be available until December 2025.

We are moving to this next stage on Monday May 5 (2025-05-05).

[1] https://www.wikidata.org/wiki/Wikidata:SPARQL_query_service/WDQS_backend_update/March_2025_scaling_update
[2] https://www.wikidata.org/wiki/Wikidata:SPARQL_query_service/WDQS_graph_split/Internal_Federation_Guide
[3] https://www.wikidata.org/wiki/Wikidata:Request_a_query
[4] https://www.wikidata.org/wiki/Wikidata:Report_a_technical_problem/WDQS_and_Search
[5] https://phabricator.wikimedia.org/T384422

Ryan