Mark Payne created NIFI-8070:
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Summary: Add a coalesce function to RecordPath
Key: NIFI-8070
URL: https://issues.apache.org/jira/browse/NIFI-8070
Project: Apache NiFi
Issue Type: Bug
Components: Extensions
Reporter: Mark Payne
Assignee: Mark Payne
There are times when it is necessary to extract one of a few different fields
from a Record, whichever is not null. We should add a coalesce function,
similar to the analog in SQL, that will return the first non-null value in a
sequence of arguments. For example, given the JSON:
{code:java}
{
"id": "1234",
"name": null
}{code}
The path `coalesce(/id, /name)` should return the `id` field. But given the
JSON:
{code:java}
{
"id": null,
"name": "John Doe"
}{code}
The same path should return the `name` field.
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