code: @Override
  	public Parameter getParam(final String paramName) {
  		Parameter param = getBindParameter(paramName);
  		if (param == null) {
  			Map<String, Parameter> constParams = getConstParameterMap();
  			if (constParams != null) {
  				param = constParams.get(paramName.toUpperCase());
  			}
  		}
  		return param;
  	}
docs: {@inheritDoc}
  
  @see jp.co.future.uroborosql.parser.TransformContext#getParam(java.lang.String)