[jira] [Commented] (HIVE-1955) Support non-constant expressions for array indexes.

["Navis (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-1955?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13530678#comment-13530678 ] 

Navis commented on HIVE-1955:
-----------------------------

Is there any reason index value should be constant?
                
> 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
>
> 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.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira