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From "Navis (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HIVE-1955) Support non-constant expressions for array indexes.
Date Fri, 04 Jul 2014 02:29:34 GMT

     [ https://issues.apache.org/jira/browse/HIVE-1955?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Navis reassigned HIVE-1955:
---------------------------

    Assignee: Navis

> Support non-constant expressions for array indexes.
> ---------------------------------------------------
>
>                 Key: HIVE-1955
>                 URL: https://issues.apache.org/jira/browse/HIVE-1955
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Adam Kramer
>            Assignee: Navis
>
> FAILED: Error in semantic analysis: line 4:8 Non Constant Expressions for Array Indexes
not Supported dut
> ...just wrote my own UDF to do this, and it is trivial. We should support this natively.
> Let foo have these rows:
> arr           i
> [1,2,3]       1
> [3,4,5]       2
> [5,4,3]       2
> [0,0,1]       0
> Then,
> SELECT arr[i] FROM foo
> should return:
> 2
> 5
> 3
> 1
> Similarly, for the same table,
> SELECT 3 IN arr FROM foo
> should return:
> true
> true
> true
> false
> ...these use cases are needless limitations of functionality. We shouldn't need UDFs
to accomplish these goals.



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