Bug 122854 There is redundant columns in "available columns" list in "export data" dialog.
Description: There is redundant columns in "available columns" list in "export data" dialog. Steps to reproduce: 1. Preview attached design in web viewer. 2. Select the table and click on "export" button. 3. There is a "detail" column name in "available columns" list which is not data set column.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/ir/Report.java
}
			else
			{
				allParameters.add( param );
			}
		}
	}
	/**
	 * Gets the parameter list of the report.
	 * 
	 * @param includeParameterGroups
	 *            A <code>boolean</code> value specifies whether to include
	 *            parameter groups or not.
	 * @return The collection of top-level report parameters and parameter
	 *         groups if <code>includeParameterGroups</code> is set to
	 *         <code>true</code>; otherwise, returns all the report
	 *         parameters.
	 */
	public ArrayList getParameters( boolean includeParameterGroups )
	{
		if ( includeParameterGroups )
		{
			return parameters;
		}
		if ( allParameters != null )
		{
			return allParameters;
		}
		allParameters = new ArrayList( );
		flattenParameter( parameters );