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Posted to issues@ignite.apache.org by "Denis Magda (JIRA)" <ji...@apache.org> on 2016/03/03 06:49:18 UTC

[jira] [Created] (IGNITE-2751) GridH2TreeIndex.getRowCount unwraps objects' values that are not used later

Denis Magda created IGNITE-2751:
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             Summary: GridH2TreeIndex.getRowCount unwraps objects' values that are not used later
                 Key: IGNITE-2751
                 URL: https://issues.apache.org/jira/browse/IGNITE-2751
             Project: Ignite
          Issue Type: Bug
    Affects Versions: 1.5.0.final
            Reporter: Denis Magda
            Priority: Critical
             Fix For: 1.6


If to run query like "SELECT COUNT(*) FROM table" then our implementation will perform a full scan filtering out entries that are not primary for a given node and will calculate only a number of primary ones.

If entries are stored off-heap then both a key and value of an entry are unswapped, Unswapped values are not used by backup filters thus we have to omit unswapping of the values at all.



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