vl.flatten(…flatten)
Map array fields to new records, one per array entry.
flatten Method Overviewflatten API Reference# flatten.as(…value)
The output field names for extracted array values.
Default value: The field name of the corresponding array field
# flatten.flatten(…value)
An array of one or more data fields containing arrays to flatten. If multiple fields are specified, their array values should have a parallel structure, ideally with the same length. If the lengths of parallel arrays do not match, the longest array will be used with null values added for missing entries.