Reading the ORC table written by Hive will result in fields being null

[dh20]

Describe the bug

When uppercase column names are used in the fields of a table, eg: [bigName] If this table has been written to an ORC file by Hive, auron reading this field will return null
To Reproduce

sql：select * from db.test group by bigName
abnormal return：

normal return:

Expected behavior

Screenshots

Additional context