Bug 177439 Need an easy way to determine default value for a dynamic parameter
Currently, I have to bring up the data set editor, preview the results in the data set and make a mental note of the value to use for a report parameter that depends on a data set. It would be nice to have a drop down on the default value field, such as <Select value> which when selected queries the data set and presents me with a list to select from.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
if ( columnChooser.indexOf( originalSelection ) != -1 )
		{
			columnChooser.setText( originalSelection );
		}
		
		
		
		
		columnChooser.setEnabled( columnChooser.getItemCount( ) > 0 );
		updateMessageLine( );
	}
	private boolean matchDataType( ResultSetColumnHandle column )
	{
		String type = getSelectedDataType( );
		if ( type.equals( DesignChoiceConstants.PARAM_TYPE_STRING )
				|| DesignChoiceConstants.COLUMN_DATA_TYPE_ANY.equals( column.getDataType( ) ) )
		{
			return true;
		}
		if ( DesignChoiceConstants.COLUMN_DATA_TYPE_DATETIME.equals( column.getDataType( ) ) )
		{
			return type.equals( DesignChoiceConstants.PARAM_TYPE_DATETIME );
		}
		else if ( DesignChoiceConstants.COLUMN_DATA_TYPE_DECIMAL.equals( column.getDataType( ) ) )
		{
			return type.equals( DesignChoiceConstants.PARAM_TYPE_DECIMAL );
		}
		else if ( DesignChoiceConstants.COLUMN_DATA_TYPE_FLOAT.equals( column.getDataType( ) ) )
		{
			return type.equals( DesignChoiceConstants.PARAM_TYPE_FLOAT );