Skip to main content
Showing results for 
Search instead for 
Did you mean: 

Earn a 50% discount on the DP-600 certification exam by completing the Fabric 30 Days to Learn It challenge.

Frequent Visitor

Data refresh error

"OLE DB or ODBC error: [DataSource.Error] MySQL: Fatal error encountered during data read.."
when our  i will do refersh i am getting this error for only one particular table in that table i have merged two tables into one table and added few required colums and condtions in this table
but some times iwll get "OLE DB or ODBC error: [DataSource.Error] MySQL: Fatal error encountered during data read".. loding time is taking 10 mins for refresh can any help me with for optimizing the time and get ride of error 

Community Support
Community Support

Hi, @Vishal_Kumar_R 

According to your description, you can try @Uzi2019 method and if it doesn't work, you can try the following methods to solve your problem.

1. Check the query and data source configuration to ensure that the queries used to merge tables and add columns do not contain any syntax errors or unsupported operations.
2. If the query is complex, consider optimising it for better performance.
Understand and optimize dataflows refresh - Power BI | Microsoft Learn
3. If the table is large, consider implementing an incremental refresh strategy for the data stream.
Using incremental refresh with dataflows - Power Query | Microsoft Learn
4. Refreshing and applying it in the query editor first. Later click the close option and move to the dashboard.
Solved: Re: OLE DB or ODBC error: [DataSource.Error] MySQL... - Page 2 - Microsoft Fabric Community


Best Regards,
Community Support Team


If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly.
If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

How to get your questions answered quickly --  How to provide sample data in the Power BI Forum

Super User
Super User

Hi @Vishal_Kumar_R 
Try to increase loading time to 500 mins



I hope this may resolve your issue.


Don't forget to give thumbs up and accept this as a solution if it helped you!!!

No it not working it taking long time to refersh the data

Helpful resources

RTI Forums Carousel3

New forum boards available in Real-Time Intelligence.

Ask questions in Eventhouse and KQL, Eventstream, and Reflex.


Power BI Monthly Update - May 2024

Check out the May 2024 Power BI update to learn about new features.


Fabric certifications survey

Certification feedback opportunity for the community.