[v24.1.x] CORE-5083 schema_registry: last subject deletes schema #21259
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Add support to `store::subject_versions_has_any_of` for including deleted subject versions. (cherry picked from commit 1edb81a)
When the last subject version corresponding to a schema is deleted, Schema Registry should also remove the schema. On the topic, the schema is already considered deleted when the last subject version is deleted, and compaction takes care of removing it. However, without this change, compaction needs to happen and then a node restart needs to happen before the schema is removed from memory. This is not ideal for use cases where schemas are frequently created and deleted (eg. Serverless), so instead we can remove the schema from memory when its last subject version is deleted. (cherry picked from commit d85de7b)
pgellert
approved these changes
Jul 8, 2024
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Backport of PR #20847