[jira] [Created] (FLINK-5156) Consolidate streaming FieldAccessor functionality

[Shang Yuanchun (Jira)]

Márton Balassi created FLINK-5156:
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             Summary: Consolidate streaming FieldAccessor functionality
                 Key: FLINK-5156
                 URL: https://issues.apache.org/jira/browse/FLINK-5156
             Project: Flink
          Issue Type: Task
            Reporter: Márton Balassi


The streaming FieldAccessors (keyedStream.keyBy(...)) have slightly different semantics compared to their batch counterparts.

Currently the streaming ones allow selecting a field within an array (which might be dangerous as the array typeinfo does not contain the length of the array, thus leading to a potential index out of bounds) and accept not only "*", but also "0" to select a whole type.

This functionality should be either removed or documented. The latter can be achieved by effectively reverting [1]. Note that said commit was squashed before merging.

[1] https://github.com/mbalassi/flink/commit/237f07eb113508703c980b14587d66970e7f6251



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