[ARROW-9881] [C++] Add support for dictionary type to arrow::read_csv

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Duplicate
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/25916
• Assignee: Unassigned
• Reporter: Dmitry Chigarev
• Created: 28/Aug/20 11:07
• Updated: 11/Jan/23 08:09
• Resolved: 03/Sep/20 12:04

Description

For now, the only way to encode column with dict-encoding is to set auto_dict_encode = True at arrow::csv::ConvertOptions

However, users should have the ability to specify column type as dict explicitly via column_types parameter. (Currently it is raising an exception that dict type is not supported)

Issue Links

• is superceded by: ARROW-7302 [C++] CSV: allow converting a column to a specific dictionary type