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Posted to notifications@asterixdb.apache.org by "Ali Alsuliman (JIRA)" <ji...@apache.org> on 2017/08/03 22:58:00 UTC

[jira] [Created] (ASTERIXDB-2016) Create secondary primary index

Ali Alsuliman created ASTERIXDB-2016:
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             Summary: Create secondary primary index
                 Key: ASTERIXDB-2016
                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-2016
             Project: Apache AsterixDB
          Issue Type: Improvement
          Components: IDX - Indexes
            Reporter: Ali Alsuliman


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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