Did you find the answer to this? All of the dashboards will need to be updated and republished with the new data source on Tableau Server. Are the data sources on Tableau server or are they local connections in Desktop that are live and published to server? The types of errors and fixes will be dependent on setup but there will certainly be issues as the data needs to be updated in each published workbook.
Thanks for the reply. I did not find any answers , everyday i am experiencing new type of issue.
I have a question for you , Why Oracle 'extract' function is not yielding any results in tableau custom sql query ? if it yields , its fetching wrong results.