Fabian Hueske created FLINK-1963:
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Summary: Improve distinct() transformation
Key: FLINK-1963
URL: https://issues.apache.org/jira/browse/FLINK-1963
Project: Flink
Issue Type: Improvement
Components: Java API, Scala API
Affects Versions: 0.9
Reporter: Fabian Hueske
Priority: Minor
Fix For: 0.9
The `distinct()` transformation is a bit limited right now with respect to
processing atomic key types:
- `distinct(String ...)` works only for composite data types (POJO, tuple), but
wildcard expression should also be supported for atomic key types
- `distinct()` only works for composite types, but should also work for atomic
key types
- `distinct(KeySelector)` is the most generic one, but not very handy to use
- `distinct(int ...)` works only for Tuple data types (which is fine)
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