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https://issues.apache.org/jira/browse/BEAM-9814?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17091725#comment-17091725
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Reuven Lax commented on BEAM-9814:
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But we should add. a schema-aware version of MapElements. Something like:
MapElements.into(outputSchema).via(row -> processRow(row) );
> Error occurred when transforming from row to a new row without setCoder
> -----------------------------------------------------------------------
>
> Key: BEAM-9814
> URL: https://issues.apache.org/jira/browse/BEAM-9814
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-core
> Affects Versions: 2.19.0
> Reporter: Ruixue Liao
> Assignee: Reuven Lax
> Priority: Major
>
> The output row from transform function uses the input row schema to verify
> which causes error. Ex:
> {code}
> .apply(MapElements.via(
> new SimpleFunction<Row, Row>() \{
> @Override
> public Row apply(Row line) {
> return Row.withSchema(newSchema).addValues("a", 1,
> "b").build();
> }
> }));
> {code}
> Got error when the output row schema is not the same as the input row.
> Need to add {{.setCoder(RowCoder.of(newSchema))}} after the transform
> function to make it work.
> Related link:
> [https://stackoverflow.com/questions/61236972/beam-sql-udf-to-split-one-column-into-multiple-columns]
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