Column name case issues

Hi,   I have a visual(eg:table/matrix) created with datasource1 (Sql server) .This has column names with mixed case letters. And I have a datasource 2 (eg:aws) with similar columns but all column names in small case. when I tried repointing from data source1 to data source 2 ,though column names are same ,it breaks due to mixed case. Is there any solution without renaming to all small case or repointing again?  I.. Any help is much appreciated. Thanks!