damccorm opened a new issue, #21067:
URL: https://github.com/apache/beam/issues/21067
When using schemas there should be no need to require a KV, as any. key or
keys can be act as the K or a V in a KV. Users can use schemas without the need
for KV in all cases except for state/timers DoFns, which today require that the
input have type KV. We would like to eliminate this requirement. Users should
be able to specify a key field extraction in their ParDo, e.g.
ParDo.of(...).withKeyFields("user.location.city"));
Or in the DoFn itself.
Imported from Jira
[BEAM-12795](https://issues.apache.org/jira/browse/BEAM-12795). Original Jira
may contain additional context.
Reported by: reuvenlax.
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