[jira] [Created] (FLINK-6547) Improve toString methods of Table API expressions

[Shang Yuanchun (Jira)]

Timo Walther created FLINK-6547:
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             Summary: Improve toString methods of Table API expressions
                 Key: FLINK-6547
                 URL: https://issues.apache.org/jira/browse/FLINK-6547
             Project: Flink
          Issue Type: Improvement
          Components: Table API & SQL
            Reporter: Timo Walther


Right now, we logically test windows like this:

{code}
term(
  "window",
  TumblingGroupWindow(
    WindowReference("w1"),
    'proctime,
    50.milli)),
{code}

But this does not test if the proctime attribute is resolved nor checks the time indicator type.

If we still rely on string comparison for tests, we need to make sure that all expressions have a rich {{toString}} function with sufficient information.



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