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https://issues.apache.org/jira/browse/CARBONDATA-3293?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dhatchayani updated CARBONDATA-3293:
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Summary: Prune datamaps improvement (was: Prune for count(*) improvement)
> Prune datamaps improvement
> --------------------------
>
> Key: CARBONDATA-3293
> URL: https://issues.apache.org/jira/browse/CARBONDATA-3293
> Project: CarbonData
> Issue Type: Improvement
> Reporter: dhatchayani
> Assignee: dhatchayani
> Priority: Major
>
> Problem:
> (1) Currently for count(*), the prune is same as select * query. Blocklet
> and ExtendedBlocklet are formed from the DataMapRow and that is of no need.
>
> Solution:
> We have the blocklet row count in the DataMapRow itself, so it is just enough
> to read the count. With this count(*) query performance can be improved.
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