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From "Aman Sinha (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-2327) Upper bound on join's row_count_estimate_factor should be increased to handle expanding joins
Date Fri, 27 Feb 2015 16:53:04 GMT

     [ https://issues.apache.org/jira/browse/DRILL-2327?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aman Sinha updated DRILL-2327:
------------------------------
    Fix Version/s: 0.8.0

> Upper bound on join's row_count_estimate_factor should be increased to handle expanding
joins
> ---------------------------------------------------------------------------------------------
>
>                 Key: DRILL-2327
>                 URL: https://issues.apache.org/jira/browse/DRILL-2327
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Query Planning & Optimization
>            Reporter: Aman Sinha
>            Assignee: Aman Sinha
>             Fix For: 0.8.0
>
>         Attachments: 0001-DRILL-2327-Raise-the-max-value-allowed-for-join-s-ca.patch
>
>
> The current bounds for planner.join.row_count_estimate_factor is between 0 to 100.  The
default value is 1.0.  This parameter determines the estimated output cardinality of a join.
 For hugely expanding joins, this is inadequate and we need to allow substantially larger
upper bound. 



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