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
ResultIterator right ) throws DataException
	{
		String leftPrefix = dataSet.getLeftDataSetDesignName( );
		String rightPrefix = dataSet.getRightDataSetDesignName( );
		if ( leftPrefix.equals( rightPrefix ) )
		{
			leftPrefix = leftPrefix + "1";
			rightPrefix = rightPrefix + "2";
		}
		leftPrefix = leftPrefix + COLUMN_NAME_SPLITTER;
		rightPrefix = rightPrefix + COLUMN_NAME_SPLITTER;
		JointResultMetadata meta = populatorJointResultMetadata( left.getOdiResult( )
				.getResultClass( ),
				leftPrefix,
				right.getOdiResult( ).getResultClass( ),
				rightPrefix );
		return meta;
	}
	/**
	 * Populate the JointResultMetadata.
	 * 
	 * @param left
	 * @param leftPrefix
	 * @param right
	 * @param rightPrefix
	 * @return
	 * @throws DataException
	 */
	private JointResultMetadata populatorJointResultMetadata(
			IResultClass left, String leftPrefix, IResultClass right,