[jira] [Created] (FLINK-4262) Consider null handling during sorting

[Shang Yuanchun (Jira)]

Timo Walther created FLINK-4262:
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             Summary: Consider null handling during sorting
                 Key: FLINK-4262
                 URL: https://issues.apache.org/jira/browse/FLINK-4262
             Project: Flink
          Issue Type: Improvement
          Components: Table API & SQL
            Reporter: Timo Walther
            Priority: Minor


Calcite's SQL parser allows to specify how to handle NULLs during sorting.

{code}
orderItem:
      expression [ ASC | DESC ] [ NULLS FIRST | NULLS LAST ]
{code}

Currently, the NULL FIRST/NULLS LAST is completely ignored but might be helpful.



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