user_name

<user_name> ::=
  <identifier>

Referenced by:

<alter_password_statement>, <alter_user_statement>, <connect_statement>, <create_user_statement>, <drop_user_statement>, <grant_user_statement>, <grant_usergroup_statement>, <granted_users>, <grantee>, <new_user_name>, <object_spec>, <rename_user_statement>, <source_user>