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 ( paramBindingIt == null )
			return null;
		List parameterBindings = new ArrayList( );
		while ( paramBindingIt.hasNext( ) )
		{
			ParamBindingHandle paramBinding = (ParamBindingHandle) paramBindingIt.next( );
			if ( paramBinding.getExpression( ) != null )
			{
				ScriptExpression paramValueExpr = new ScriptExpression( paramBinding.getExpression( ) );
				InputParameterBinding inputParamBinding = new InputParameterBinding( paramBinding.getParamName( ),
						paramValueExpr );
				parameterBindings.add( inputParamBinding );
			}
		}
		return parameterBindings;
	}
	/**
	 * @param dataSetName
	 * @throws AdapterException
	 * @throws BirtException
	 */
	private void defineDataSet( DataSetHandle handle ) throws AdapterException,
			BirtException
	{
		if ( handle == null )
			throw new AdapterException( ResourceConstants.DATASETHANDLE_NULL_ERROR );
		
		DataSourceHandle dataSourceHandle = handle.getDataSource( );
		if ( dataSourceHandle != null )