Matt Burgess created NIFI-8659:
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Summary: JoltTransformRecord should support transformation of one
record to multiple output records
Key: NIFI-8659
URL: https://issues.apache.org/jira/browse/NIFI-8659
Project: Apache NiFi
Issue Type: Improvement
Reporter: Matt Burgess
Currently the JOLT transformation in JoltTransformRecord is applied to each
record individually, and a single record is expected and written out. However
there are some cases where multiple output records are desired for each input
record, such as "hoisting" a nested array of records up to the top-level
(without a top-level key which would make it a single record). For example:
Input record:
{"x": [{"a": 1, "b":2}, {"a": 3, "b": 4}, {"a": 5, "b": 6}]}
Desired output (3 records):
[
{"a": 1, "b":2},
{"a": 3, "b": 4},
{"a": 5, "b": 6}
]
This would currently still require the schema of the array elements to be
identical, as the first transformed record's schema will be used to write all
the output records.
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