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
}
		if( dataSet.getComputedColumns( )!= null)
		{
			for( int i = 0; i <dataSet.getComputedColumns( ).size( ); i++)
			{
				IComputedColumn cc = (IComputedColumn)dataSet.getComputedColumns( ).get(i);
				index[i + left.getFieldCount( ) + right.getFieldCount( ) ] = -1;
				columnSource[i + left.getFieldCount( ) + right.getFieldCount( )] = JointResultMetadata.COLUMN_TYPE_COMPUTED;
				projectedColumns.add( new ResultFieldMetadata( i,
						cc.getName( ),
						cc.getName( ),
						DataType.getClass( cc.getDataType( ) ),
						null,
						true ) );
			}
		}
		if ( dataSet.getResultSetHints( ) != null )
		{
			List hintList = dataSet.getResultSetHints( );
			for ( int i = 0; i < hintList.size( ); i++ )
			{
				IColumnDefinition columnDefinition = (IColumnDefinition) hintList.get( i );
				for ( int j = 0; j < projectedColumns.size( ); j++ )
				{
					ResultFieldMetadata resultFieldMetadata = (ResultFieldMetadata) projectedColumns.get( j );
					if ( columnDefinition.getColumnName( )
							.equals( resultFieldMetadata.getName( ) ) )
					{
						resultFieldMetadata.setAlias( columnDefinition.getAlias( ) );
						break;