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/impl/PreparedQuery.java
IGroupDefinition group = (IGroupDefinition) groups.get(i);
			if ( groupText.equals( group.getName()) ||
				 groupText.equals( group.getKeyColumn() ) ||
				 groupText.equals( group.getKeyExpression()) )
			 {
				return i + 1;			
			 }
		}
		return -1;
	}
	
	/**
	 * @return the group count defined in report query
	 */
	int getGroupCount()
	{
		assert queryDefn != null;
		return queryDefn.getGroups().size();
	}
	
	/**
	 * PreparedQuery.Executor: executes a prepared query and maintains execute-time data and result
	 * set associated with an execution.
	 * 
	 * A PreparedQuery can be executed multiple times. Each execute is performed by one instance of 
	 * the Executor.
	 * 
	 * Each subclass of PreparedQuery is expected to have its own subclass of the Executor.
	 */
	abstract class Executor