Below workbook illustrates my problem.
1. Created extract data;
2. Create Group as shown below;
3. Extract data... and below errors comes up;
4. Click OK and Extract data again results in below grouping of members;
5. Remove extract results in below grouping
This was certainly not an issue in previous versions and is no causing problems on my existing reports with large data sources.
Book1.twbx 17.3 KB
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I was able to reproduce the issue you experienced. I was not aware of this but I did find an explanation for you:
It is definitely possible Tableau made changes to the data engine which provide better support for case-sensitivity in Extracts with 9.0, but you may want to contact support for a definitive answer on this one.
To get around this, you may need to normalize your strings before bringing them into Tableau if you're data-entry side is not that consistent.