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https://issues.apache.org/jira/browse/IGNITE-6702?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vyacheslav Koptilin updated IGNITE-6702:
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Description: 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.
(was: 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.)
> 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
> Components: sql
> Reporter: Semen Boikov
> Assignee: Kirill Shirokov
> Priority: Major
> 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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