[ARROW-14782] [C++][Python] The ORC writer does not support all-null object columns from Pandas

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Fix Version/s: 11.0.0
• Component/s: C++, Python
• Labels: orc
• External issue URL: https://github.com/apache/arrow/issues/30317
• Assignee: Unassigned
• Reporter: Ian Alexander Joiner
• Created: 21/Nov/21 10:05
• Updated: 11/Jan/23 08:42

Description

Object columns in Pandas are currently converted to Null type columns in Arrow and they can not be written using `pyarrow.orc.write_table`. Since ORC doesn't support Null type columns we need to find the appropriate DataType for such columns and do the write.