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https://issues.apache.org/jira/browse/FLINK-6059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15926053#comment-15926053
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ASF GitHub Bot commented on FLINK-6059:
---------------------------------------
GitHub user fhueske opened a pull request:
https://github.com/apache/flink/pull/3546
[FLINK-6059] [table] Reject GenericType<Row> when converting DataSet or
DataStream to Table
When converting a `DataSet<Row>` or `DataStream<Row>` into a `Table` which
has `GenericTypeInfo<Row>` type, the row is treated as atomic type. This is
always a non-expected and confusing behavior.
With this change converting a `DataSet<Row>` or `DataStream<Row>` with
`GenericTypeInfo<Row>` into a `Table` fails. Instead we ask for a
`DataSet<Row>` or `DataStream<Row>` with proper `RowTypeInfo`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/fhueske/flink tableNoGenericRow
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/3546.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #3546
----
commit 0064a9ed1270d1e139ff9a6b22df5cc95450ce59
Author: Fabian Hueske <[email protected]>
Date: 2017-03-15T12:24:42Z
[FLINK-6059] [table] Reject GenericType<Row> when converting DataSet or
DataStream to Table.
----
> Reject DataSet<Row> and DataStream<Row> without RowTypeInformation
> ------------------------------------------------------------------
>
> Key: FLINK-6059
> URL: https://issues.apache.org/jira/browse/FLINK-6059
> Project: Flink
> Issue Type: Bug
> Components: Table API & SQL
> Affects Versions: 1.2.0, 1.3.0
> Reporter: Fabian Hueske
> Assignee: Fabian Hueske
>
> It is not possible to automatically extract proper type information for
> {{Row}} because it is not typed with generics and holds values in an
> {{Object[]}}.
> Consequently is handled as {{GenericType<Row>}} unless a {{RowTypeInfo}} is
> explicitly specified.
> This can lead to unexpected behavior when converting a {{DataSet<Row>}} or
> {{DataStream<Row>}} into a Table. If the data set or data stream has a
> {{GenericType<Row>}}, the rows are treated as atomic type and converted into
> a single field.
> I think we should reject input types of {{GenericType<Row>}} when converting
> data sets and data streams and request a proper {{RowTypeInfo}}.
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