Roman Puchkovskiy created IGNITE-20789:
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             Summary: Remove outdated schemas stored in SchemaManager
                 Key: IGNITE-20789
                 URL: https://issues.apache.org/jira/browse/IGNITE-20789
             Project: Ignite
          Issue Type: Improvement
            Reporter: Roman Puchkovskiy


When a schema version is not needed (that is, no tuple can be written in this 
schema AND no tuple exists in the storage (that is written in this schema) that 
can be read), it should be removed.

Only whole prefixes might be removed (so, if we must keep version N, then we 
cannot remove versions N+).



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