[jira] [Created] (FLINK-11142) Undefined behavior in the conversion from DataStream/DataSet to Table
Yangze Guo created FLINK-11142:
Summary: Undefined behavior in the conversion from DataStream/DataSet to Table
Issue Type: Bug
Components: Table API & SQL
Affects Versions: 1.7.0
Reporter: Yangze Guo
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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