[PARQUET-1958] Forced UTF8 encoding of BYTE_ARRAY on stream::read/write

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: cpp-1.5.0
• Component/s: parquet-cpp
• Assignee: Unassigned
• Reporter: ian
• Created: 23/Dec/20 15:54
• Updated: 24/Feb/21 10:02

Description

StreamReader& StreamReader::operator>>(optional<std::string>& v) {
 CheckColumn(Type::BYTE_ARRAY, ConvertedType::UTF8);
 ByteArray ba;

 

StreamWriter& StreamWriter::WriteVariableLength(const char* data_ptr,
 std::size_t data_len) {
 CheckColumn(Type::BYTE_ARRAY, ConvertedType::UTF8);

 

Though the C++ Parquet::Schema::Node allows physical type of BYTE_ARRAY with ConvertedType=NONE, the stream reader/writer classes throw when ConvertedType != UTF8.

std::string is, unfortunately, the canonical byte buffer class in C++.

A simple approach might be to create >>parquet::ByteArray.. with columnCheck(BYTE_ARRAY, NONE), and let the user take it from there.  that would use the existing methods that >>std::string uses.. just an idea.

I am new to this forum, and have assigned MAJOR to this bug, but gladly defer to those who have a better grasp of classification.