Bug 128359 The logic is not correctly when a filter is added to the table on the layout
Description: The logic is not correctly when a filter is added to the table on the layout Steps to reproduce: Let me give an example. 1. Creat a report, new a datasource and a dataset 2. We consume that the dataset has 10 records(DataResult_A) . We set a filter(Filter_A) in the dataset, and then the 6 records of the dataset(DataResult_B) are gained. 3. Drag the dataset to the layout, and set another filter(Filter_B) on the table. Actual result: The result of Filter_B is based on DataResult_A. Expect result: The result of Filter_B should be based on DataResult_B.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/executor/transform/FilterUtil.java
{
	/**
	 * No instance
	 */
	private FilterUtil( )
	{
	}
	
	/**
	 * Exam whether one filter need multipass. A filter that need multipass is
	 * the Top/Bottom N filters
	 * 
	 * @param filter
	 * @return
	 */
	public static boolean isFilterNeedMultiPass( IFilterDefinition filter )
	{
		return ( filter.getExpression( ) instanceof IConditionalExpression && isMultiPassFilterOperator( ( (IConditionalExpression) filter.getExpression( ) ).getOperator( ) ) );
	}
	/**
	 * Exam whether one operatorId refer to a multipass filter operator
	 * 
	 * @param operatorId