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
* @param groupSpecs
		 * @param i
		 */
		private int getTempComputedColumnType( int i )
		{
			int interval = i;
			if( interval == IQuery.GroupSpec.DAY_INTERVAL 
				|| interval == IQuery.GroupSpec.HOUR_INTERVAL
				|| interval == IQuery.GroupSpec.MINUTE_INTERVAL
				|| interval == IQuery.GroupSpec.SECOND_INTERVAL
				|| interval == IQuery.GroupSpec.MONTH_INTERVAL
				|| interval == IQuery.GroupSpec.QUARTER_INTERVAL
				|| interval == IQuery.GroupSpec.YEAR_INTERVAL
				|| interval == IQuery.GroupSpec.WEEK_INTERVAL )
				interval = DataType.DATE_TYPE;
			else if ( interval == IQuery.GroupSpec.NUMERIC_INTERVAL )
				interval = DataType.DOUBLE_TYPE;
			else if ( interval == IQuery.GroupSpec.STRING_PREFIX_INTERVAL )
				interval = DataType.STRING_TYPE;
			else
				interval = DataType.ANY_TYPE;
			return interval;
		}
	}
	
	/**
	 * Simple wrapper of colum information, including column index and column
	 * name.
	 */
	private static class ColumnInfo