Bug 136973 Refresh problem-column name in chart builder
Description: Use flat file datasource, if change the column name in flat file, the column name will changed in data explorer but not refreshed in chart builder accordingly. Only restart Eclipse will get the correct information.
data/org.eclipse.birt.report.data.adapter/src/org/eclipse/birt/report/data/adapter/impl/QueryExecutionHelper.java
if ( ( (DataSetHandle) l.get( i ) ).getQualifiedName( ) != null
					&& ( (DataSetHandle) l.get( i ) ).getQualifiedName( )
							.equals( dataSetName ) )
			{
				handle = (DataSetHandle) l.get( i );
			}
		}
		defineDataSet( handle );
	}
	/**
	 * @param queryDefn
	 * @param paramBindingIt
	 * @param filterIt
	 * @param bindingIt
	 */
	private void populateQueryDefn( QueryDefinition queryDefn,
			Iterator paramBindingIt, Iterator filterIt, Iterator bindingIt )
	{
		while ( bindingIt != null && bindingIt.hasNext( ) )
		{
			IComputedColumn column = this.modelAdaptor.adaptComputedColumn( (ComputedColumnHandle) bindingIt.next( ) );
			ScriptExpression sxp = (ScriptExpression) column.getExpression( );
			sxp.setDataType( column.getDataType( ) );
			queryDefn.addResultSetExpression( column.getName( ), sxp );
		}
		List parameterBindings = convertParamterBindings( paramBindingIt );
		
		if ( parameterBindings != null )
			queryDefn.getInputParamBindings( ).addAll( parameterBindings );