Function CountUtf8Chars

be/src/exprs/string-functions-ir.cc:279–286

}

static int CountUtf8Chars(uint8_t* ptr, int len) {
  if (ptr == nullptr) return 0;
  int cnt = 0;
  for (int i = 0; i < len; ++i) {
    if (BitUtil::IsUtf8StartByte(ptr[i])) ++cnt;
  }
  return cnt;
}

IntVal StringFunctions::Utf8Length(FunctionContext* context, const StringVal& str) {
  if (str.is_null) return IntVal::null();