Forum Discussion
Loading data with append option using dataflow and problem with the deleted rows
Hi anusha_2023
Thank you very much frithjof_v and lbendlin for your prompt reply.
Your plan for handling stream updates and deletions is comprehensive.
Some suggestions for reducing computing overhead:
Make sure your Lakehouse table has a primary key constraint, which will prevent duplicate rows from being inserted.
Deduplication logic can be implemented directly in the data flow. Use Power Query to remove duplicates based on the primary key before loading the data into Lakehouse.
The separation of ETL processes into staging and transforming data streams can help optimize refresh times and reduce computational overhead.
Periodically monitor the performance of data streams and optimize queries to ensure efficient data processing.
Best practices for creating a dimensional model using dataflows - Power Query | Microsoft Learn
Regards,
Nono Chen
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Hi anusha_2023
Perhaps you can consider configuring incremental refreshes.
Make sure your data extraction process is incremental, meaning it only gets new records or changed records since the last load.
Regards,
Nono Chen
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Deleted Rows: I need a way to track and handle deleted rows from the source, ensuring that the same deletions are reflected in the destination tables in the Lakehouse.Power BI cannot modify individual rows. The lowest level available is the partition. You need to process the entire partition even if there is a change only in a single column/single row.
This is not inside Power BI. Loading data inside the Fabric environment workspace using dataflow gen2 through on-premises gateway connection.
Can you use a Notebook and do Upsert (Merge) instead of using Dataflow Gen2?
I need to get the current state of source primary keys. In order to get the data I do have only option connect through dataflow gen2 beacuse of on-premises data in IFS BI tool through on-premises gateway.
