[jira] [Created] (PHOENIX-5577) Uncovered columns are retrieved one-by-one in local index scans.

["Lars Hofhansl (Jira)" <ji...@apache.org>]

Lars Hofhansl created PHOENIX-5577:
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             Summary: Uncovered columns are retrieved one-by-one in local index scans.
                 Key: PHOENIX-5577
                 URL: https://issues.apache.org/jira/browse/PHOENIX-5577
             Project: Phoenix
          Issue Type: Improvement
            Reporter: Lars Hofhansl


See RegionScannerFactory.getWrappedScanner(...) -> new RegionScanner(...).nextRaw(...) -> IndexUtil.wrapResultUsingOffset(...)

For a batched get this issues a Get back to the same region. While the Get is local, it still needs to setup a scanner and seek to the right key each time. This is pretty inefficient. Local indexes could be much, much faster at read time for larger scans.



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