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https://issues.apache.org/jira/browse/FLINK-37616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17941810#comment-17941810
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Sergey Nuyanzin commented on FLINK-37616:
-----------------------------------------
Merged as
[ec810badf19dc6eeef46230dfcb690c88bf211cd|https://github.com/apache/flink/commit/ec810badf19dc6eeef46230dfcb690c88bf211cd]
> PyFlink incorrectly unpickles Row fields within a Row
> -----------------------------------------------------
>
> Key: FLINK-37616
> URL: https://issues.apache.org/jira/browse/FLINK-37616
> Project: Flink
> Issue Type: Bug
> Components: API / Python
> Reporter: Mika Naylor
> Assignee: Mika Naylor
> Priority: Minor
> Labels: pull-request-available
>
> If you call {{TableEnvironment.from_elements}} where one of the fields in the
> row contains a {{Row}} Type, for example where one of the values you pass in
> is:
> {code:java}
> [
> Row("pyflink1A", "pyflink2A", "pyflink3A"),
> Row("pyflink1B", "pyflink2B", "pyflink3B"),
> Row("pyflink1C", "pyflink2C", "pyflink3C"),
> ],{code}
> where the schema for the field is:
> {code:java}
> DataTypes.ARRAY(
> DataTypes.ROW(
> [
> DataTypes.FIELD("a", DataTypes.STRING()),
> DataTypes.FIELD("b", DataTypes.STRING()),
> DataTypes.FIELD("c", DataTypes.STRING()),
> ]
> )
> ),{code}
> When you call {{execute().collect()}} on the table, the array is returned as:
> {code:java}
> [
> <Row(['pyflink1a', 'pyflink2a', 'pyflink3a'])>,
> <Row(['pyflink1b', 'pyflink2b', 'pyflink3b'])>,
> <Row(['pyflink1c', 'pyflink2c', 'pyflink3c'])>
> ]{code}
> Instead of each {{Row}} having 3 values, the collected row only has 1 value,
> which is now a list of the actual values in the row. The input and output
> rows are no longer equal (as their internal _values collection are no longer
> equal, one being a list of strings and the other being a list of a list of
> strings). The len() of the source Row is correctly returned as 3, but the
> collected row incorrectly reports a len() of 1.
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