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Posted to issues@quickstep.apache.org by "Zuyu Zhang (JIRA)" <ji...@apache.org> on 2017/08/20 21:10:01 UTC

[jira] [Updated] (QUICKSTEP-96) Fuse Selection into BuildHash

     [ https://issues.apache.org/jira/browse/QUICKSTEP-96?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zuyu Zhang updated QUICKSTEP-96:
--------------------------------
    Summary: Fuse Selection into BuildHash  (was: Fuse Selection in BuildHash)

> Fuse Selection into BuildHash
> -----------------------------
>
>                 Key: QUICKSTEP-96
>                 URL: https://issues.apache.org/jira/browse/QUICKSTEP-96
>             Project: Apache Quickstep
>          Issue Type: Improvement
>          Components: Query Optimizer, Relational Operators
>            Reporter: Zuyu Zhang
>
> We may improve the hash join performance by avoiding intermediate materialization for a table scan on the stored build relation with predicates, if the SelectOperator is not used as repartition.
> To this end, we may add an optimization rule on the physical plan, and we need to make sure it works with FilterJoin as well.



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