[ARROW-5052] [C++] Add an incomplete dictionary type

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 0.12.1
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/16047
• Assignee: Unassigned
• Reporter: Antoine Pitrou
• Created: 28/Mar/19 12:45
• Updated: 11/Jan/23 07:37
• Resolved: 22/May/19 15:03

Description

This would allow to pass a DataType that means "dict-encoded data with the given index types and value types, but the actual values are not yet known" (they might be inferred by processing non-dict-encoded data, or they might be transferred explicitly - but later - in the data stream).

Issue Links

• is depended upon by: ARROW-3408 [C++] Add option to CSV reader to dictionary encode individual columns or all string / binary columns
• is depended upon by: ARROW-3200 [C++] Add support for reading Flight streams with dictionaries
• links to: GitHub Pull Request #4067