[ARROW-7517] [C++] Builder does not honour dictionary type provided during initialization

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 0.15.0
• Fix Version/s: 2.0.0
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/23782
• Assignee: Unassigned
• Reporter: Wamsi Viswanath
• Created: 08/Jan/20 17:55
• Updated: 11/Jan/23 07:54
• Resolved: 07/Sep/20 16:16

Description

Below is an example for reproducing the issue:

https://gist.github.com/wamsiv/d48ec37a9a9b5f4d484de6ff86a3870d

Builder automatically optimizes the dictionary type depending upon the number of unique values provided which results in schema mismatch.

 

Issue Links

• is superceded by: ARROW-9642 [C++] Let MakeBuilder refer DictionaryType's index_type for deciding the starting bit width of the indices