Function findFirstPlusOrMinus

bolt/type/TimestampConversion.cpp:1006–1016

  if (pos1 > pos2 || pos2 >= str.size()) {
    return false;
  }
  std::string_view sub = str.substr(pos1, pos2 - pos1);
  return targets.find(sub) != targets.end();
}

std::optional<std::pair<Timestamp, int16_t>> fromTimestampWithTimezoneString(
    const char* str,
    size_t len) {
  size_t pos;
  Timestamp resultTimestamp;

  if (!tryParseTimestampString(str, len, pos, resultTimestamp)) {
    return std::nullopt;
  }