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Posted to dev@iotdb.apache.org by "Jialin Qiao (Jira)" <ji...@apache.org> on 2020/02/26 02:42:00 UTC

[jira] [Commented] (IOTDB-504) Confusing implementations of next()

    [ https://issues.apache.org/jira/browse/IOTDB-504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17045091#comment-17045091 ] 

Jialin Qiao commented on IOTDB-504:
-----------------------------------

Hi, In the new query engine, we have fixed all hasNext and next method. This could be closed

> Confusing implementations of next()
> -----------------------------------
>
>                 Key: IOTDB-504
>                 URL: https://issues.apache.org/jira/browse/IOTDB-504
>             Project: Apache IoTDB
>          Issue Type: Bug
>    Affects Versions: master branch
>            Reporter: Tian Jiang
>            Priority: Major
>              Labels: query, reader
>         Attachments: image-2020-02-20-17-54-01-852.png
>
>
> Some implementations of `next()` in readers are confusing, calling `next()` without calling `hasNext()` will not move the cursor to the next element, which is counter-common-practice. See the attachment for one example.



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