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User and role names may optionally be surrounded by back-tick backtick characters (`) when the configuration parameter hive.support.quoted.identifiers
is set to column
(default value). All Unicode characters are permitted in the quoted identifiers, with double backticks (``) representing a backtick character. However when hive.support.quoted.identifiers
is set to none
, only alphanumeric and underscore characters are permitted in user names and role names.
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