You open the Parquet Decoder agent configuration dialog from a workflow configuration. To open the Parquet Decoder agent configuration, click Build → New Configuration. Select Workflow from the Configurations dialog. When prompted to to Select workflow type, select Batch. Click Add agent and select Parquet Decoder from the Processing tab of the Agent Selection dialog.
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Parquet documents include embedded schemas, and so setting a schema with a profile is only needed when filtering the full set of columns - selecting a subset of the columns actually available in the document.
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