[jira] [Created] (IGNITE-16395) Calcite engine. Implement correct copy-on-write on schema objects change

["Aleksey Plekhanov (Jira)" <ji...@apache.org>]

Aleksey Plekhanov created IGNITE-16395:
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             Summary: Calcite engine. Implement correct copy-on-write on schema objects change
                 Key: IGNITE-16395
                 URL: https://issues.apache.org/jira/browse/IGNITE-16395
             Project: Ignite
          Issue Type: Improvement
            Reporter: Aleksey Plekhanov


Currently, we only copy the schemas list when any schema object changes (see {{{}SchemaHolderImpl.rebuild(){}}}), but it can lead to some problems. For example, during planning, if some index dropped concurrently there will be NPE after {{tbl.getIndex(String)}} in some rules. So, we should copy the table containing this index and copy the schema containing this table at least for DROP INDEX command.



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