[C++] Duplicate values in a dictionary result in corrupted parquet #26235
Description
Initial discussion: https://lists.apache.org/thread.html/r8afb5aed3855e35fe03bd3a27f2c7e2177ed2825c5ad5f455b2c9078%40%3Cdev.arrow.apache.org%3E
Reporter: Ben Kietzman / @bkietz
Assignee: Ben Kietzman / @bkietz
Related issues:
- DictionaryArray with non-unique values are silently corrupted when written to a Parquet file (duplicates)
PRs and other links:
Note: This issue was originally created as ARROW-10237. Please see the migration documentation for further details.