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Posted to issues-all@impala.apache.org by "Paul Rogers (JIRA)" <ji...@apache.org> on 2019/03/04 23:14:00 UTC
[jira] [Work started] (IMPALA-8258) Enhance functional tables with
realistic star-schema simulation
[ https://issues.apache.org/jira/browse/IMPALA-8258?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Work on IMPALA-8258 started by Paul Rogers.
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> Enhance functional tables with realistic star-schema simulation
> ---------------------------------------------------------------
>
> Key: IMPALA-8258
> URL: https://issues.apache.org/jira/browse/IMPALA-8258
> Project: IMPALA
> Issue Type: Improvement
> Components: Frontend
> Affects Versions: Impala 3.1.0
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Priority: Minor
>
> The tables in the `functional` db provide many interesting cases. The tables in TPC-H and TPC-DS simulate a well-behaved application.
> We also need some tables that show messy, real-world cases:
> * Correlated filters (same filter on multiple tables)
> * Correlated keys (same join key across multiple tables)
> * Extreme data skew
> A simple four-table start-schema structure can give us what we want.
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