Bug 137464 apply a filter on a Join dataset in chart editor's select data page, the data preview part is not refresh
Description: use the attach file.When apply a filter on a Join dataaset in chart editor's select data page, the data preview part is not refresh. Step to reproduce: 1. open the attach file 2. creat a chart and choose select data page 3. use the Jiondataset and set the X Y series 4. chilck a filter with row["Data Set1::EMPLOYEEID"] =1 Actual result: look at the data preview after you apply the filter,you will find it haven't change any more but the filter has effect Ecepted result: the data preview should refresh after set a filter
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/PreparedJointDataSourceQuery.java
String rightPrefix ) throws DataException
	{
		int length = left.getFieldCount( )
		+ right.getFieldCount( )+ ((dataSet.getComputedColumns( )==null)?0:dataSet.getComputedColumns( ).size( ));
		int[] index = new int[length];
		int[] columnSource = new int[length];
		List projectedColumns = new ArrayList( );
		for ( int i = 1; i <= left.getFieldCount( ); i++ )
		{
			index[i - 1] = i;
			columnSource[i - 1] = JointResultMetadata.COLUMN_TYPE_LEFT;
			projectedColumns.add( new ResultFieldMetadata( i,
					leftPrefix + left.getFieldName( i ),
					leftPrefix + left.getFieldName( i ),
					left.getFieldValueClass( i ),
					left.getFieldNativeTypeName( i ),
					false ) );
		}
		for ( int i = left.getFieldCount( ) + 1; i <= left.getFieldCount( )+right.getFieldCount( ); i++ )
		{
			index[i - 1] = i - left.getFieldCount( );
			columnSource[i - 1] = JointResultMetadata.COLUMN_TYPE_RIGHT;
			projectedColumns.add( new ResultFieldMetadata( i,
					rightPrefix
							+ right.getFieldName( i - left.getFieldCount( ) ),
					rightPrefix
							+ right.getFieldName( i - left.getFieldCount( ) ),
					right.getFieldValueClass( i - left.getFieldCount( ) ),
					right.getFieldNativeTypeName( i - left.getFieldCount( ) ),
					false ) );