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Posted to issues@impala.apache.org by "Aman Sinha (Jira)" <ji...@apache.org> on 2021/12/01 20:45:00 UTC

[jira] [Created] (IMPALA-11044) Support projecting write id as a virtual column for insert-only transactional tables

Aman Sinha created IMPALA-11044:
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             Summary: Support projecting write id as a virtual column for insert-only transactional tables
                 Key: IMPALA-11044
                 URL: https://issues.apache.org/jira/browse/IMPALA-11044
             Project: IMPALA
          Issue Type: Improvement
          Components: Backend, Frontend
    Affects Versions: Impala 4.0.0
            Reporter: Aman Sinha


For insert-only transactional tables, it would be useful to project the write id as a virtual column such that partition and/or file pruning can be done based on the write id.  For compacted folders, some thought needs to be given for what can be projected in order to do a more coarse grained filtering (since file pruning is not possible after compaction). 



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