message: Enable the timestamp value from string.
diff: @@ -123,7 +123,8 @@ bool SchemaUtil::checkType(std::vector<cpp2::ColumnDef> &columns) {
  break;
  }
  case cpp2::PropertyType::TIMESTAMP:
  - if (value.type() != nebula::Value::Type::INT) {
  + if (value.type() != nebula::Value::Type::INT &&
  + value.type() != nebula::Value::Type::STRING) {
  LOG(ERROR) << "Invalid default value for ` " << name
  << "', value type is " << value.type();
  return false;
  