Forum Discussion
Table.Combine in parallel possible?
I am monitoring this in the source system (SAP). FYI we are using an OData service based on SAP data to pull in the data.
In that SAP monitor, I can see only the first subquery executing, and once it finishes it starts the 2nd one in the Table.Combine list of tables, etc.
If I keep 'Enable Load' enabled on the subqueries, then I see 4 queries hitting SAP at the same time: the 3 subqueries and the first subquery in the Table.Combine list.
Interestingly, the remaining 2 subqueries in the Table.Combine list are no longer sent to SAP. Assume this is because by the time Table.Combine starts processing them, they are already somehow cached.
- lbendlin1 year agoSuper User
In such scenarios we create separate queries, disable load for all, and return a query combine rather than a table combine. Make sure not to overwhelm the data source when you crank the parallelism up to 30.