Query:

SELECT ?type ?typeLabel ?count WHERE {
  {
    SELECT ?type (COUNT(DISTINCT ?constraint) AS ?count) WHERE {
      ?property a wikibase:Property;
                p:P2302 ?constraint.
      ?constraint ps:P2302 ?type.
    }
    GROUP BY ?type ?typeLabel
  }
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}
ORDER BY DESC(?count)

Results

I assume to track this over time we need to run that query periodically somewhere and write the results to Graphite. @Addshore I think you set up something similar for the number of open tasks, do you know how to do this?

Minor detail: what exactly do we want to track? The most logical thing would be the constraint type item ID, but then it will be a bit tricky to look at in Grafana. But if we track the English label the results will become disconnected any time that label changes.

Change 425872 had a related patch set uploaded (by Ladsgroup; owner: Amir Sarabadani):
[analytics/wmde/scripts@master] Track number of constraint definition snaks over time

https://gerrit.wikimedia.org/r/425872

Change 425872 merged by jenkins-bot:
[analytics/wmde/scripts@master] Track number of constraint definition snaks over time

https://gerrit.wikimedia.org/r/425872

Change 427348 had a related patch set uploaded (by Ladsgroup; owner: Amir Sarabadani):
[analytics/wmde/scripts@production] Track number of constraint definition snaks over time

https://gerrit.wikimedia.org/r/427348

Change 427348 merged by jenkins-bot:
[analytics/wmde/scripts@production] Track number of constraint definition snaks over time

https://gerrit.wikimedia.org/r/427348

Moving this back until the graph is in grafana.

https://grafana.wikimedia.org/dashboard/db/wikidata-quality?orgId=1&from=now-7d&to=now

Change 427628 had a related patch set uploaded (by Lucas Werkmeister (WMDE); owner: Lucas Werkmeister (WMDE)):
[mediawiki/extensions/WikibaseQualityConstraints@master] Mention “constraint types” panel in README instructions

https://gerrit.wikimedia.org/r/427628

Change 427628 merged by jenkins-bot:
[mediawiki/extensions/WikibaseQualityConstraints@master] Mention “constraint types” panel in README instructions

https://gerrit.wikimedia.org/r/427628