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From "Yingyi Bu (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (ASTERIXDB-1131) The function-generated Null is omitted when construct a List
Date Fri, 03 Jun 2016 20:50:59 GMT

     [ https://issues.apache.org/jira/browse/ASTERIXDB-1131?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yingyi Bu reassigned ASTERIXDB-1131:
------------------------------------

    Assignee: Yingyi Bu  (was: Ildar Absalyamov)

> The function-generated Null is omitted when construct a List
> ------------------------------------------------------------
>
>                 Key: ASTERIXDB-1131
>                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-1131
>             Project: Apache AsterixDB
>          Issue Type: Bug
>          Components: Data Model
>            Reporter: Jianfeng Jia
>            Assignee: Yingyi Bu
>
> I hit a failed test case in which I was building a list with the elements generated from
a build-in function, as below,
> for $a in [
> starts-with("xyz",  null),
> starts-with("xy", "x")
> ]
> return $a
> If any of the elements is Null, it will be omitted in the returned list, e.g. the above
query returns the following result:
> [ true
>  ]
> However if I explicitly add a null in the list, all the Nulls will be returned.
> the following query:
> for $a in [
> null,
> starts-with("xy",  null),
> starts-with("xy", "x")
> ]
> return $a
> will return the expected result:
> [ null
> , null
> , true
>  ]
> It applies for other similar functions which return an option value. 



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