Zoltan Haindrich created HIVE-22773:
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Summary: Accept identifiers starting with underscore
Key: HIVE-22773
URL: https://issues.apache.org/jira/browse/HIVE-22773
Project: Hive
Issue Type: Improvement
Components: Parser
Reporter: Zoltan Haindrich
I think we may also want to consider to accept identifiers starting with _
mysql, psql accepts:
{code}
create table _t(_a integer)
{code}
meanwhile hive and oracle does not.
the sql2011 standard suggest that the first char can be:
{code}
1) An is any character in the Unicode General Category classes “Lu”, “Ll”,
“Lt”, “Lm”, “Lo”, or “Nl”.
{code}
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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