Ivan Bessonov created IGNITE-17338:
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             Summary: Implement RocksDB based hash index storage
                 Key: IGNITE-17338
                 URL: https://issues.apache.org/jira/browse/IGNITE-17338
             Project: Ignite
          Issue Type: Improvement
            Reporter: Ivan Bessonov


Please see IGNITE-17318 for partial description of what needs to be achieved.

I expect that hash index records will have the following structure:
{code:java}
[ indexId | partitionId | hash | tuple | rowId ] -> []{code}
Fixed-length prefix should cover indexId, partitionId and hash value.

Searching rows effectively becomes a scan, but this is fine.

Hashing must be performed internally, hash function already presents somewhere 
in the code.

Is far as I understand, PK is going to be implemented as a secondary hash index.



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