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From "BELUGA BEHR (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-18343) Remove LinkedList from ColumnStatsSemanticAnalyzer.java
Date Tue, 26 Dec 2017 18:16:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-18343?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

BELUGA BEHR updated HIVE-18343:
-------------------------------
    Status: Patch Available  (was: Open)

> Remove LinkedList from ColumnStatsSemanticAnalyzer.java
> -------------------------------------------------------
>
>                 Key: HIVE-18343
>                 URL: https://issues.apache.org/jira/browse/HIVE-18343
>             Project: Hive
>          Issue Type: Improvement
>          Components: HiveServer2
>    Affects Versions: 3.0.0
>            Reporter: BELUGA BEHR
>            Assignee: BELUGA BEHR
>            Priority: Trivial
>         Attachments: HIVE-18343.1.patch
>
>
> Remove {{LinkedList}} in favor of {{ArrayList}} for class {{org.apache.hadoop.hive.ql.parse.ColumnStatsSemanticAnalyzer}}.
> {quote}
> The size, isEmpty, get, set, iterator, and listIterator operations run in constant time.
The add operation runs in amortized constant time, that is, adding n elements requires O\(n\)
time. All of the other operations run in linear time (roughly speaking). *The constant factor
is low compared to that for the LinkedList implementation.*
> {quote}



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