Does Redshift Support Query Folding?

[ccconley]

Hi All,

Our company is using Redshift as the database. We noticed slowness when we trying to load large dataset (100MM + Rows table) into Power BI Service. Even when we turned on the incremental refresh, it's slow. We ended up using the XMLA endpoint to load partitions by batch. Does Redshift connection support query folding? Does anyone have some Redshift - Power BI best practices?

Thanks,

Conley

[v-kkf-msft · Accepted solution]

Hi @ccconley ,

Please try to use the OLE DB connector to import data from Redshift. As an option, you can also specify a SQL statement to execute against the OLE DB driver.

If the problem is still not resolved, please provide detailed error information or the expected result you expect. Let me know immediately, looking forward to your reply.

Best Regards,
Winniz

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[ccconley]

Thanks Winniz. We used ODBC connector before but the performance is also very bad. Is there a performance difference when using the OLE DB connector?

[ebeery]

@ccconley a quick search found this thread which seemed to indicate that no, Redshift does not support folding.

https://community.powerbi.com/t5/Power-Query/Query-folding-for-Redshift/td-p/863458