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Posted to issues@hive.apache.org by "Zoltan Haindrich (JIRA)" <ji...@apache.org> on 2017/11/09 18:09:00 UTC

[jira] [Updated] (HIVE-18005) Improve size estimation for array() to be not 0

     [ https://issues.apache.org/jira/browse/HIVE-18005?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zoltan Haindrich updated HIVE-18005:
------------------------------------
    Issue Type: Sub-task  (was: Bug)
        Parent: HIVE-11160

> Improve size estimation for array() to be not 0
> -----------------------------------------------
>
>                 Key: HIVE-18005
>                 URL: https://issues.apache.org/jira/browse/HIVE-18005
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Statistics
>            Reporter: Zoltan Haindrich
>
> happens only in case the array is not from a column; and the array contains no column references
> {code}
> EXPLAIN
> SELECT sort_array(array("b", "d", "c", "a")),array("1","2") FROM t
> ...
>              Statistics: Num rows: 1 Data size: 0 Basic stats: COMPLETE Column stats: COMPLETE
>              ListSink
> {code}



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