[ARROW-8172] [C++] ArrayFromJSON for dictionary arrays

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Duplicate
• Affects Version/s: 0.16.0
• Fix Version/s: 2.0.0
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/17096
• Assignee: Unassigned
• Reporter: Ben Kietzman
• Created: 20/Mar/20 15:15
• Updated: 11/Jan/23 07:58
• Resolved: 20/Mar/20 15:19

Description

It would be useful for testing if ArrayFromJSON could be instructed to dictionary encode its values by passing a dictionary type.

auto dict_encoded_strings = ArrayFromJSON(dictionary(int8(), utf8()), R"([
  "whiskey", "tango", "foxtrot"
])");

See discussion https://github.com/apache/arrow/pull/6641#pullrequestreview-377768482

Issue Links

• duplicates: ARROW-7372 [C++] Allow creating dictionary array from simple JSON