Bug 123036 Data in a reprot is doubly stored
We currently stored data twice. Once in the content stream, once by DtE. The instance stored by content stream should not be there.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/document/RDLoad.java
return exprValueMap.get( expr.getID( ) );
	}
	/**
	 * @return
	 * @throws DataException
	 */
	int getSubQueryIndex( int currParentIndex ) throws DataException
	{
		subQueryUtil = new RDSubQueryUtil( this.context,
				this.queryResultID,
				this.subQueryName );
		return subQueryUtil.getSubQueryIndex( currParentIndex );
	}
	/**
	 * @param groupLevel
	 * @throws DataException
	 */
	void skipToEnd( int groupLevel ) throws DataException
	{
		this.rdGroupUtil.last( groupLevel );
	}
	/**
	 * @return
	 * @throws DataException
	 */
	int getStartingGroupLevel( ) throws DataException
	{
		return this.rdGroupUtil.getStartingGroupLevel( );
	}
	/**