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Posted to issues@flink.apache.org by "Fabian Hueske (JIRA)" <ji...@apache.org> on 2018/12/22 00:30:00 UTC

[jira] [Updated] (FLINK-11142) Undefined behavior in the conversion from DataStream/DataSet to Table

     [ https://issues.apache.org/jira/browse/FLINK-11142?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fabian Hueske updated FLINK-11142:
----------------------------------
    Issue Type: Improvement  (was: Bug)

> Undefined behavior in the conversion from DataStream/DataSet to Table
> ---------------------------------------------------------------------
>
>                 Key: FLINK-11142
>                 URL: https://issues.apache.org/jira/browse/FLINK-11142
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table API &amp; SQL
>    Affects Versions: 1.7.0
>            Reporter: Yangze Guo
>            Assignee: Hequn Cheng
>            Priority: Minor
>
> When we try to convert DataStream/DataSet to Table. There are two ways of adding schema information, *ByName* or *ByPosition*.
> This feature first proposed in [this pr|https://github.com/apache/flink/pull/5132].
> In *ByPosition* mode, the current code does not check if the number of fields less than its in  DataStream/DataSet. This may cause undefined behavior, e.g. make a projection in *ByPosition* mode.
> We can either fix it by adding some checking or regard this as a feature and just improve the doc to clarify it. In my opinion, the latter way seems better.
> [~twalthr] Could you take a look at it when you free?



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