Bug 168026 Still use the existing data binding even though the aggregate is different
I had a table in which a data binding which aggregates on a group. When I insert a new data item in the report, although the expressions are same, it aggregates on All, then it refered to the existing data binding. The expected behavior would be a new data binding is created with different aggregates.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ScalarParameterHandle.java
*            The display prompt context.
	 * 
	 * @throws SemanticException
	 * 
	 */
	public void setPromptText( String promptValue ) throws SemanticException
	{
		setStringProperty( PROMPT_TEXT_PROP, promptValue );
	}
	/**
	 * get the display prompt text.
	 * 
	 * @return the display prompt.
	 * 
	 */
	public String getPromptText( )
	{
		return getStringProperty( PROMPT_TEXT_PROP );
	}
	/**
	 * Set the value for the prompt text ID.
	 * 
	 * @param promptIDValue
	 *            The prompt text ID.
	 * 
	 * @throws SemanticException
	 * 
	 */
	public void setPromptTextID( String promptIDValue )
			throws SemanticException