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https://issues.apache.org/jira/browse/IGNITE-6702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16253378#comment-16253378
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ASF GitHub Bot commented on IGNITE-6702:
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GitHub user gg-shq opened a pull request:
https://github.com/apache/ignite/pull/3037
[IGNITE-6702] Get rid of values deserialization in H2TreeIndex.getRowCount
Committing preliminary version to run tests on TC
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gridgain/apache-ignite ignite-6702
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/ignite/pull/3037.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #3037
----
commit a7541202bb835c6e0dff004c06ea222384a53549
Author: gg-shq <[email protected]>
Date: 2017-11-15T12:20:04Z
IGNITE-6702: Change H2TreeIndex.getRowCount() to use BPlusTree.size()
method instead of BPlusTree.find() + iteration
commit c31145be5ee11a7bd3cb72f960e03e9212a964d8
Author: gg-shq <[email protected]>
Date: 2017-11-15T12:20:30Z
IGNITE-6702: Change H2TreeIndex.getRowCount() to use BPlusTree.size()
method instead of BPlusTree.find() + iteration
----
> Get rid of values deserialization in H2TreeIndex.getRowCount
> ------------------------------------------------------------
>
> Key: IGNITE-6702
> URL: https://issues.apache.org/jira/browse/IGNITE-6702
> Project: Ignite
> Issue Type: Improvement
> Security Level: Public(Viewable by anyone)
> Components: sql
> Reporter: Semen Boikov
> Assignee: Kirill Shirokov
> Labels: performance
> Fix For: 2.4
>
>
> It seems H2TreeIndex.getRowCount is called for 'select count(*) from x'
> queries, now it is implemented via BPlusTree.find(x, x) method which
> deserializes all values. Actually values are not needed there, need implement
> method on BPlusTree computing size without deserialization.
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