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Posted to dev@calcite.apache.org by "Hongze Zhang (JIRA)" <ji...@apache.org> on 2018/09/05 03:03:00 UTC

[jira] [Created] (CALCITE-2530) Reasonable behavior of TRIM function when the length of trim character is not 1(one)

Hongze Zhang created CALCITE-2530:
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             Summary: Reasonable behavior of TRIM function when the length of trim character is not 1(one)
                 Key: CALCITE-2530
                 URL: https://issues.apache.org/jira/browse/CALCITE-2530
             Project: Calcite
          Issue Type: Improvement
          Components: core
            Reporter: Hongze Zhang
            Assignee: Julian Hyde


Calcite's TRIM function takes the first character of <trim character> string to trim the <trim source>, whereas SQL standard suggests to report a "trim error" when the length of <trim character> is not 1.

I am not sure if this could be treated as an issue(since the calcite's way might has better availability), until I found this:

[https://issues.apache.org/jira/browse/BEAM-4704|https://issues.apache.org/jira/browse/BEAM-4704]

It seems user could be sometimes confused with the behavior of TRIM function.



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