Bug 182695 Backport RowFetchLimit setting in model to 2.1.3
In 2.1.3 Model add new methods DataSetHandle.setDataSetRowLimit() and DataSetHandle.getDataSetRowLimit() to let user define the number of rows that returned from database. This however duplicate with existing 2.2 model methods DataSetHandle.setRowFetchLimit() and DataSetHandle.getRowFetchLimit(). Model should backport the changes to 2.1.3.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/DataSetHandle.java
assert propHandle != null;
		return propHandle.iterator( );
	}
	/**
	 * Returns an iterator for the list of computed columns. The iterator
	 * returns instances of <code>ComputedColumnHandle</code> that represents
	 * computed column object.
	 * 
	 * @return iterator over computed columns.
	 * @see org.eclipse.birt.report.model.api.elements.structures.ComputedColumn
	 */
	public Iterator computedColumnsIterator( )
	{
		PropertyHandle propHandle = getPropertyHandle( IDataSetModel.COMPUTED_COLUMNS_PROP );
		assert propHandle != null;
		return propHandle.iterator( );
	}
	/**
	 * Returns an iterator over column hints. The iterator returns instances of
	 * <code>ColumnHintHandle</code> that represents column hint object.
	 * 
	 * @return iterator over column hints.
	 * 
	 * @see org.eclipse.birt.report.model.api.elements.structures.ColumnHint
	 */
	public Iterator columnHintsIterator( )
	{
		PropertyHandle propHandle = getPropertyHandle( IDataSetModel.COLUMN_HINTS_PROP );
		assert propHandle != null;
		return propHandle.iterator( );