[PARQUET-1038] Key value metadata should be nullptr if not set

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: cpp-1.1.0
• Fix Version/s: cpp-1.2.0
• Component/s: parquet-cpp
• Assignee: Unassigned
• Reporter: Phillip Cloud
• Created: 22/Jun/17 19:39
• Updated: 23/Jun/24 03:29
• Resolved: 23/Jun/17 04:51

Description

Key value metadata is initialized with std::make_shared<KeyValueMetadata>() which returns a pointer to an empty instance of KeyValueMetadata. This breaks Arrow's deserialization of metadata because it distinguishes between nullptr and empty metadata.