docs: @Override
  	public StatementParameter getParam() {
  		if (!isMergedParam) {
  			StatementParameter param = where.getParam();
  			int size = param.size();
  			for (int i = 0; i < size; i++) {
  				Class<?> type = param.getType(i);
  				Object value = param.getObject(i);
  				statementParameter.setObject(type, value);
  			}
  		}
  		isMergedParam = true;
  		return statementParameter;
  	}