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Posted to notifications@asterixdb.apache.org by "Ali Alsuliman (JIRA)" <ji...@apache.org> on 2018/10/31 22:21:00 UTC

[jira] [Assigned] (ASTERIXDB-2015) Create secondary primary index

     [ https://issues.apache.org/jira/browse/ASTERIXDB-2015?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ali Alsuliman reassigned ASTERIXDB-2015:
----------------------------------------

    Assignee: Ali Alsuliman

> Create secondary primary index
> ------------------------------
>
>                 Key: ASTERIXDB-2015
>                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-2015
>             Project: Apache AsterixDB
>          Issue Type: Improvement
>          Components: IDX - Indexes
>            Reporter: Ali Alsuliman
>            Assignee: Ali Alsuliman
>            Priority: Major
>
> This change is regarding introducing secondary primary index. The secondary primary index is a secondary B-Tree that is built on the primary keys of the dataset but only stores the {PK} instead of the regular case {SK,PK}. The purpose of this secondary is to optimize queries like SELECT count(*). Instead of scanning the primary index, the secondary primary index would be used to answer such queries.



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