Bug 131011 Support running query based on report document data
Data Engine should support running a query based on data set and expression data stored in a report document. This bugzilla entry serves as a repository for design docs and notes related to this feature.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/QueryExecutor.java
{
    		dataSet.afterClose();
		}
	    catch (DataException e )
		{
			logger.logp( Level.FINE,
						QueryExecutor.class.getName( ),
						"close",
						e.getMessage( ),
						e );
		}
	    dataSet = null;
		dataSource = null;
	    
		logger.logp( Level.FINER,
				QueryExecutor.class.getName( ),
				"close",
				"executor closed " );
	}
	/*
	 * @see org.eclipse.birt.data.engine.impl.IQueryExecutor#getDataSet()
	 */
	public DataSetRuntime getDataSet( )
	{
		return dataSet;
	}
	
	/*
	 * @see org.eclipse.birt.data.engine.impl.IQueryExecutor#getSharedScope()
	 */