Fabian Hueske created FLINK-1776:
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Summary: APIs provide invalid Semantic Properties for Operators
with SelectorFunction keys
Key: FLINK-1776
URL: https://issues.apache.org/jira/browse/FLINK-1776
Project: Flink
Issue Type: Bug
Components: Java API, Scala API
Affects Versions: 0.9
Reporter: Fabian Hueske
Assignee: Fabian Hueske
Priority: Critical
Fix For: 0.9
Semantic properties are defined by users and evaluated by the optimizer.
When semantic properties such as forwarded or read fields are bound to the
input type of a function.
In case of operators with selector function keys, a user function is wrapped by
a wrapping function that has a different input types than the original user
function. However, the user-defined semantic properties are verbatim forwarded
to the optimizer.
Since the properties refer to a specific type which is changed by the wrapping
function and the semantic properties are not adapted, the optimizer uses wrong
properties and might produce invalid plans
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