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  1. Hive
  2. HIVE-22773

Accept identifiers starting with underscore

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    Details

    • Type: Improvement
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: Parser
    • Labels:
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      Description

      I think we may also want to consider to accept identifiers starting with _

      mysql, psql accepts: 

      create table _t(_a integer)
      

      meanwhile hive and oracle does not.

      the sql2011 standard suggest that the first char can be:

      1) An  is any character in the Unicode General Category classes “Lu”, “Ll”, “Lt”, “Lm”, “Lo”, or “Nl”.
      

      which includes the a _ named "low macron"
      https://www.fileformat.info/info/unicode/char/02cd/index.htm
      but... the "low line"
      https://www.fileformat.info/info/unicode/char/005f/index.htm
      is in the Pc class...

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            • Assignee:
              Unassigned
              Reporter:
              kgyrtkirk Zoltan Haindrich
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              • Created:
                Updated: