Method UpperUtf8

be/src/exprs/string-functions-ir.cc:450–455

}

StringVal StringFunctions::UpperUtf8(FunctionContext* context, const StringVal& str) {
  return Utf8CaseConversion(context, str,
      [](uint32_t wide_char, bool* word_start) {
        return std::towupper(wide_char);
      });
}

StringVal StringFunctions::InitCapUtf8(FunctionContext* context, const StringVal& str) {
  return Utf8CaseConversion(context, str,